-
Artificial
Macronutrients
, Natural
Micronutrients
and Disease
Timothy
Bilash
MD, MS,
OBGYN
Course Outline and References
Northern Inyo
Hospital Symposium
Bishop, CA 8/25/2008
-
Abstract
-
Commonly, Nutritional Guidelines have focused on Genetic, Hypertensive and Dietary
Cholesterol Factors in Human Disease, particulary
for Heart Attack, Stroke, and Obesity.
This talk highlights how Artificial Dietary Substances (which dominate in our diet), and
Nutrient Deficiencies (such as Vitamin B12), have severe health consequences.
-
Topics
-
Fructose and Obesity
- Trans Fat, Corn Oil
, Heart Disease, Cancer
-
Essential Fatty Acids
-
Vitamin B12, the Giant Vitamin
-
The FLING Diet ®
-
Clinical Objectives
-
Identify how Fructose and Hydrogenated Fats contribute to Disease
-
Contrast the Metabolic Effects of Omega-3 and Omega-6 Essential Fatty Acids
-
Identify 3 Metabolic Pathways for Vitamin B12
-
Fructose and Obesity
- High Fructose Corn Syrup
- Sucrose
(Table Sugar) is made up of
one Glucose
+ one Fructose
, bonded
together
[182]
- Sucrose
is digested
in the Intestines
by the enzyme Sucrase
,
producing Free Glucose + Free Fructose
[183]
- High Fructose Corn Syrup
is manufactured
from Corn Starch
. [181]
- High Fructose Corn Syrup
from Corn Starch results in a mixture
of
Free D-Glucose
and Free D-Fructose, as unbound
Monsaccharides
. [183]
- Free D-Glucose (and D-Fructose) equilibrates in solution to a mixture of Alpha and
Beta forms, which for Glucose is in the ratio of (36%Alpha) to (64%Beta). [188]
- There may be more Beta-Glucose when the Free Glucose and Free Fructose in HFCS
has a chance to equilibrate (36%Alpha/64%Beta) than when Sucrose (Cane/Beet Sugar)
is enzymatically split and then immediately absorbed at the brush border
in the Duodenum and Small Intestine (50%Alpha/50%Beta).
- High Fructose Syrup Corn Syrup would thus undergo a longer equilibration to Beta
forms. Alpha-Glucose more readily enters the
Glycolitic
(Energy), and Beta-Glucose
more readily enters the Pentose (Anabolic), pathways in Adipose. [189] More of the
Glucose would be available for Energy as opposed to Storage in this Hypothesis.
- Sugar Intake
has increased
in the United States
.
While there is a decrease in Sucrose consumption, HFCS
and total Sugar
consumption has skyrocketed. [185]
- Obesity Increase
parallels
Increases in HFCS
and
Free Fructose
in the United States. [Bray 186]
-
- Fructose
stimulates its Intestine Transporter Protein
GLUT5.
[184]
Fructose Metabolism gives some clues that a mechanism of Obesity
is related to Sugar Absorption.
High Fructose
(
GLUT5
Transport) increases
the concentration of
its own Glut5 Transporter Protein
by 50%.
Glucose
(
GLUT1
Transport), in contrast, has no effect on
its own GLUT1 Transporter Protein.
- Fructose
increases
Its Own Uptake
from the Intestine
.
This is likely related to the GLUT5 concentration increase above. (There is
another complicated mechanism of Fructose co-transport with Glucose
which is not discussed here). [184]
- Metabolism of Sugar (
MonoSaccharides
)
[42-48,44a]
- Overview of Glucose/Fructose Absorption and Transport
- First
, Sugars are ABSORBED from the Intestine
lumen
and TRANSPORTED
to the Liver
in steps:
1-
From
the Intestinal Lumen (GLUT2)
2-
Into
Enterocyte
across the epithelium on the lumen side (
SGLUT1
vs GLUT5
)
3-
Out from the Enterocyte
on the non-lumen side into the Portal Vein Blood
(
GLUT2
)
3-
Into the Liver cell
(
GLUT2
) from the Portal Vein
4-
Inside
the Liver cell
, Sugars need to be trapped (
phosphorylated
)
and
then metabolized
5
-
Sugars
follow a concentration gradient
- Glucose Transport Proteins
(GLUT)
are needed to transport Sugar in or out of cells
- These "Small" 6 carbon Hexose
sugars (Glucose, Fructose) are
too large to cross
cell membrane without "carriers"
. [48a]
- Absorption
into
the
Intestine Cell
(from the Gut)
Glucose/
SGLUT1
vs Fructose/
GLUT5
- Glucose
(
from the Gut)
- GLUCOSE is absorbed
from the Gut into the Enterocyte
thru
Active Diffusion
[SGLUT
1
]
.
- Glucose
absorption from the intestine
is thus energy dependent
and rate limited
, a facilitated transport
.
- SGLUT1
is the transporter that carries Glucose into the Enterocyte
.
It is a sodium-dependent hexose
transporter which transports
both glucose and sodium ion into the cell, and in fact
will not transport either alone.
- Once inside the enterocyte
, Glucose and Sodium must then be
co-exported from the cell into blood to allow further absorption.
Sodium is exchanged for potassium by the sodium pumps,
which maintains the electrochemical gradient across the epithelium.
The energy stored in this gradient is actually what is driving Glucose entry.
- Fructose
(
from the Gut)
- FRUCTOSE is absorbed
from the Gut into the Enterocyte
thru
Passive Diffusion
[GLUT
5
]
.
- Fructose absorption from the Intestine
is thus
energy in-dependent
and diffusion limited
.
- GLUT5
another hexose
transporter, transports Fructose into
the Enterocyte
- Fructose is
not
co-transported with sodium.
- Transport into the Portal Blood
- GLUT2
transports both
Glucose and Fructose
out of the Enterocyte
into the Portal Blood. They diffuse
"down" a concentration gradient into
capillary blood and enter the Portal System
.
- Entry into/out of
the Liver
- GLUT2
transports both
Fructose and Glucose into and out of the Liver
down a concentration gradient.
- Second
, SUGAR is digested in the Liver, to Glycogen or Fat
, or
converted
to Energy.
- Glycolysis
in the Liver: Fructose vs Glucose Hexose
Pathways [42]
- Glucose Digestion in the Liver
- Glucose
breakdown to (GAP+
DAP)
is
metabolically rate limited
.
[42]
- INITIATION
: Glucose metabolism to G-6-P (used to make Fat,
Glycogen, or Energy)
is metabolically controlled
thru Hexokinase
[
HK
]
& Glucokinase
[
GK
]
.
- Hexokinase
is dominant at low
sugar concentrations
(product-inhibited)
- Glucokinase
is active at high
sugar concentrations
(turned on with more Glucose, not
product-inhibited)
- CONTROL
: Subsequent breakdown to GAP+
DAP
is metabolically controlled
thru PhosphoFructokinase
[
PFK
-1 and PFK
-2
]
- PhosphoFructokinase
-1 [
PFK
-1] produces Fructose1,6P
- High levels of ATP
, Citrate
, and
Low pH
(Lactic Acidosis
)
inhibit
PFK
-1
- Ammonia
activates
PFK
-1
- PhosphoFructokinase
-2
[
PFK
-2
] produces
Fructose2,6P
- PFK
-2 is controlled by the hormones Insulin
and Glucagon
.
- Fructose2,6P
is a potent activator of PFK
-1
- Fructose Digestion in the Liver
- Fructose, however, by-passes rate control steps
for breakdown to GAP+
DAP
. [42]
- INITIATION
: Fructose metabolism
to F-1-P
is not metabolically controlled
thru Fructokinase
[
HK
]
- Fructose intitiation
to F1P has no product inhibition
(
immediate conversion
,
used to make Fat, Glycogen, or Energy)
- Fructokinase
has no product inhibition. The higher the
Fructose level, the more enters the Liver and is stored
- Excess Fructose is thus easily stored as Fat.
Fructose (or high Sucrose=Fructose+Glucose) rapidly
enters the Glycolysis
pathway, leading to Fat Synthesis
- CONTROL
:
F-1-P breakdown
to
GAP+
DAP
is not metabolically controlled
- Feeding Effects on Liver Glycolysis
- Fructose also acts as a trigger for Sugar metabolism
- Glucokinase
normally produces Glycogen
and Pyruvate
only at higher
Blood Glucose
.
- Trace levels of Fructose, however,
activates Glucokinase
***
- Fructose increases
Glucokinase
actvity
and Glucose storage
,
by
inducing transport of Glucokinase
back into the Cytosol
from the Nucleus.
- Fructose also dissociates the Glucokinase
/Receptor
complex,
which further activates
Glucokinase
.
- These activations occurs within 10 minutes, at Fructose concentrations
above 5mM, with maximum activity above 25mM. Glucose also does this,
but only at higher concentrations.
- R
estricting carbohydrates
decreases calories burned by
lowering
basal metabolism, limiting weight loss.
- Restriction of protein and fat
maintains
basal metabolism, allowing
greater weight loss. [44a]
- Normal
Metabolism of Glucose and Fructose in the Liver after a meal:
Glycogen, Fatty Acids, and ATP are produced [42]
- Fructose
markedly
catalyses
Glucokinase
, increasing
Glycogen
and
Fatty Acid Flux
in the Liver. High Sugar flux produces
Fat to be stored.
- Third
, SUGAR is RELEASED
from the Liver
into the Arterial Blood
- Only Liver and Kidneys can mobilize Glucose
- Glucose-6-
Phosphatase
releases Glucose
, balanced by Glucokinase
which
stores Glucose
.
- Glucokinase
adds a Phosphate to Sugar, initiating storage.
- Glucose-6-
Phosphatase
cleaves that Phosphate, releasing
Glucose
to transport across the membrane.
- Liver and Kidney can also synthesize Glucose from Amino Acids
(derived from Proteins in the Diet, or from the body's Muscle Mass)
- Fourth
, SUGAR is OXIDIZED
in the Cells
- Liver
is the only organ that can process Fructose
, because it contains Fructokinase
- Muscle and Brain
cannot burn Fructose
.
- Muscle
burns Glucose or Fat
- Fructose
provides muscle energy only after the
Liver has converted it to Glucose or Fat
- Fructose is also converted to Glucose by Muscle Hexokinase
, but this is
inhibited at high Fructose concentrations
- Muscle activity increases Glucose entry
into Muscles (exercise lowers Blood Sugar).
- Brain
can only burn Glucose
- Fructose
provides energy only after the Liver has converted it to Glucose
- Fatty Acids
have no uptake
mechanism in the Brain so cannot supply brain energy.
- Ketone Bodies
(Acetyl Acetate or ß-Hydroxybutyrate
)
can diffuse into the brain,
but it takes almost two weeks to adapt to starvation
. At most, Ketone Bodies
provide about 50%
of the brain's energy, the balance must still come from Glucose.
- Warming Fructose in food processing converts its 5-ring form to a 6-ring. The metabolic
effects of this is unclear.
- Fructose makes you hungry
(Elliott 2002)
[44]
Sugar and Fructose consumption has gone UP!
- Fructose Summary
- High Fructose Corn Syrup (
HFCS
)
contains 42%- 55% Fructose.
It is produced thru high temperature hydrolysis of Corn Starch
. The
resulting Glucose Syrup
is then enzymatically
isomerized
to the sweeter
High Fructose +
Glucose Syrup
(
HFCS
) and used in foods.
- Fructose does not stimulate Insulin
Release
(no GLUT5 in ß cells)
,
so Fructose consumption does not dampen appetite
.
- "
Fructose
has been implicated as a contributor to nearly all of the classic
manifestations of the Insulin Resistance Syndrome
." [44]
- Fructose feeds sugar continuously into Fat production
.
- Fructose when eaten just before 2 hours of exercise is oxidized (burned)
less than is Glucose or Resistant Starch
(54% vs 70%). [46]
- "
It is preferable to consume dietary Carbohydrates in the
form of Glucose
"
(Glucose and Resistant Starch) rather than Fructose
,
based on the endocrine and metabolic effects. [44a]
- Resistant Starch
[45]
- Resistant starch (
RS
)
is any starch that is not digested in the small intestine and
passes to the large bowel for fermentation.
- Calories from RS
that are undigested in the small intestine can be salvaged by fermentation
to short-chain fatty acids (
SCFA
; acetate, butyrate, proprionate
) by the microflora
of the large bowel.
- Retrograded Amylose
(a linear polymer of glucose
residues linked by Alpha Bonds
),
such as cooked and cooled starchy foods like pasta salad
, and
native starch granules, such as found in high-amylose
maize starch and bananas
,
are the major components of dietary Resistant Starch.
- High Fructose Corn syrup contains Beta Bonds
.
- Replacement of 5.4% of total dietary carbohydrate with RS
significantly increased
post-prandial
lipid oxidation and therefore could decrease fat accumulation
in the long-term.
More Fat was oxidized at the 5.4% RS
relative to the 0% RS
meal, with a concomitant decrease in
total carbohydrate oxidation. A hypothesis is that higher dietary RS
(10.7%) also acts like dietary fiber. [46]
-
Fatty Acids
-
Chain Length of Fatty Acids [157]
-
Fatty Acids with 4 to 12 carbon atoms are found mainly in Milk Fats
(mainly Butyric in Cow and
Decanoic
in sheep), Coconut and Palm Oils.
-
Short-chain
fatty acids have four to six carbon atoms.
-
These fats are always saturated.
-
Four-carbon butyric acid is found mostly in butterfat from cows, and six-carbon
capric
acid is found mostly in butterfat from goats.
-
They do not need to be acted on by the bile salts and are directly absorbed
for quick energy. For this reason, they are less likely to cause weight gain than
olive oil or commercial vegetable oils
-
These fatty acids have
antimicrobial
properties—that is, they protect us from
viruses, yeasts and pathogenic bacteria in the gut.
-
Short-chain fatty acids also contribute to the health of the
immune system.
-
Medium-chain
fatty acids have eight to twelve carbon atoms and are found
mostly in butterfat and the tropical oils.
-
Like the short-chain fatty acids,
these fats have
antimicrobial
properties; are absorbed directly for quick
energy; and contribute to the health of the immune system.
-
Long-chain
fatty acids have from 14 to 18 carbon atoms and can be either
saturated, monounsaturated or polyunsaturated. [157]
-
Stearic
acid is an 18-carbon saturated fatty acid found chiefly in beef and
mutton tallows.
-
Oleic acid is an 18-carbon monounsaturated fat which is the chief
component of olive oil.
-
Another monounsaturated fatty acid is the 16-carbon
palmitoleic
acid which
has strong
antimicrobial
properties. It is found almost exclusively in animal
fats.
-
The two essential fatty acids
LNA
and LA are also long chain, each
18 carbons in length.
-
Another important long-chain fatty acid is
gamma-linolenic
acid
(
GLA
) which has 18 carbons and three double bonds. It is found in evening
primrose, borage and black currant oils. Your body makes
GLA
out of
omega-6
linoleic
acid and uses it in the production of substances called
prostaglandins
, localized tissue hormones that regulate many processes at
the cellular level.
-
Stearic
acid is reported to be neutral in terms of blood cholesterol
concentration.
The
stearic
acid content of milk fat is 12.1g/100g. Therefore, if
stearic
acid were
redefined from a saturated fat, then the saturated fat content of milk fat drops from
51.3g to 39.2g/10 g. [29]
-
Very-long-chain
fatty acids have 20 to 24 carbon atoms.
-
They tend to be highly unsaturated, with four, five or six double bonds.
-
Some people can
make these fatty acids from
EFA's
, but others, particularly those whose
ancestors ate a lot of fish, lack enzymes to produce them. These "obligate
carnivores" must obtain them from animal foods such as organ meats, egg
yolks, butter and fish oils.
-
The most important very-long-chain fatty acids are
dihomo-gamma-linolenic
acid (
DGLA
) with 20 carbons and three double bonds;
arachidonic
acid (AA)
with 20 carbons and four double bonds;
eicosapentaenoic
acid (EPA) with
20 carbons and five double bonds; and
docosahexaenoic
acid (
DHA
) with
22 carbons and six double bonds.
-
All of these except
DHA
are used in the production of
prostaglandins
,
localized tissue hormones that direct many processes in the cells.
-
In addition, AA and
DHA
play important roles in the function of the nervous system.
-
Note that some report Fat Ratios by weight, others by molar ratios. As well, the
classification of chain length is slightly different for Essential Fatty Acids.
-
(De)Hydrogenation of Fats
[25-36]
-
Three Classes of Fatty Acids
a:
Saturated(soft fat)
, b:
Cis-Unsaturated
(oil)
, c:
Trans-Unsaturated(hard fat)
-
(
"
Saturated
"
) /
Fully-Hydrogenated
Fatty Acids
-
No
double bonds (only single bonds)
CH
3
-(CH
2
)
n
-COOH
in a chain of (n+1) carbons:
-
Animal Fat
-
Soft
at room temperature,
flexible (medium temperature)
-
No Dehydrogenation is Full Hydrogenation (no removal of hydrogens)
-
Increased Health risks,
Increased
LDL
levels
-
Ex:
Stearic
Acid (a major component of Animal Fat)
All
18 Carbon atoms single bond in a
floppy
chain (no double bonds) [34,35]
-
("
Cis-Unsaturated
") /
Cis-Partial
(De)Hydrogenated Fatty Acids
-
One or more
Cis
double bonds in a chain of otherwise single bonded carbons:
-
Seed Oils, Naturally-occurring
-
Liquid
at room temperature (
Cis
low temperature
)
-
Partial
Hyd
rogenation is Partial
Dehyd
rogenation
-
Improved Health
-
Ex:
Oleic
Acid, Monounsaturated
(
Cis
w-9, a major component of Olive Oil)
18 Carbon Atoms, most single bonds in a chain (one double bond in a
Cis
kink
) [34,35]
-
(
"
Trans-Unsaturated
"
) /
Trans-Partial
(De)Hydrogenated Fatty Acids
-
One or more
Trans double bonds
in a chain of otherwise single bonded carbons:
-
Artificially produced, Industrial Waste Product
-
Solid
at room temperature,
inflexible
(
Trans high temperature
)
-
"Partially Hydrogenated Vegetable Oil", "Vegetable Shortening"
-
Partial Hydrogenation is Partial Dehydrogenation
-
Partial Hydrogenation destroys some Essential Fatty Acids
(such as
Linolenic
and
Linoleic
acid) which oxidize to become rancid.
This extends shelf life but removes nutrient value.
-
Ex:
Elaidic
Acid Monounsaturated (Trans w-9, a major component
of Vegetable Oil)
18 Carbon atoms in a
straight
,
rigid
configuration [34,35]
-
Fatty Acid Structural Differences (3 Types of Carbon Double Bonds)
Trans
-Unsaturated(
Hard Fat
)
/
Saturated
(
Soft Fat
)
/
Cis
-Unsaturated
(
Oil
)
[33]
-
Fatty Acids are Components of Membranes
-
Fatty acids are the "two-by-fours" which build membranes
-
Membrane
Phospholipids
[40a]
-
Membrane Structure[40b]
-
Saturated (Soft) vs
Cis-Unsaturated
(Oil) Fatty Acid Properties
The type of Fatty Acid changes the Fluidity properties:
Cis
-Unsaturated
(Bent, Poorly Packed) =
Oil
Saturated
(Straight, Floppy) =
Soft Fat
Trans
-Unsaturated (Straight, Stiff, Well Packed) =
Hard Fat
-
Saturated and Essential Fatty Acids in Animal and Plant Fats and Oils [181]
(Note that vegetable oils tend to have higher
Linoleic
Acid - w6 content)
-
Health Effects of POLYUNSATURATED(
PUFA
) & TRANS(
TFA
) FATS
-
Hydrogenation of Fat
[29e,32,32b]
-
Partial hydrogenation
, the process used to create
Trans Fatty Acids
, is
primarily used to produce
solid fats
. However, it also
removes essential
polyunsaturated fatty acids
, such as
linolenic
acid (omega 3) and
linoleic
acid (omega 6), which although tend to
oxidize
and cause the fat to become
rancid
with prolonged storage or when exposed to the high temperatures
used for commercial deep-fat frying.
Natural (Low-temperature) Trans fatty acids
are also produced
in the rumen of cattle, resulting in low levels of these isomers in dairy
and beef fat. These have different properties from the Artificial Trans Fats. [29e]
-
Production of partially hydrogenated fats began early in the 20th
century
and increased steadily until about the 1960s, as processed
vegetable fats displaced animal fats in the diets of most people in
industrialized countries. [29e]
-
Vegetable Fat
consumption has
increased
,
particularly
Trans
Fat
;
-
Trans Fat
represents
2.6%
of average American's total caloric intake.
-
Saturated Fat
represent
12.5%
of total calories.
-
Animal Fat
has
stayed constant or slightly declined
,
while
Cancer Incidence
and Mortality
have
increased
. Trans fat consumption was always a significant
factor in the multiple correlation analysis for total cancer deaths (
Enig
and
Munn
1978). [100,132]
-
New Food Labeling of Trans Fats
-
Trans Fat
of
less than
0.5gm/serving
can be
labeled 0gm Trans Fat
-
Fat Source Effect on
LDL
,
HDL
[39]
-
Note that Essential
Monunsaturated
and Polyunsaturated Fats contain
CIS
and no Trans double bonds. Saturated Fats have no double bonds at all.
-
LDL
/
HDL
Ratios
[
Ascherio
29a,
Almendingen
29g]
-
Studies replace (10% of Total Energy) or (Soy + 70%) of the indicated Fatty Acid
-
Poly-Unsaturates
(Trans-Hydrogenation) double the
LDL
/
HDL
Ratio.
-
Margarines
are usually higher in
Cis-Polyunsaturated
Fat than Butter.
A reduction in
LDL
/
HDL
is obtained with
Low-Trans
Tub Margarine (Soft)
-
Note that when Soy Oil in Diet is high, there is little difference in the
LDL
/
HDL
ratio
between adding Butter or Poly-Unsaturated Oils.
Replacement of
Butter
with
Hard stick Margarine
(20-25% Trans Fat) has the same effect on the
HDL
Cholesterol Ratios.
-
HDL
and
LDL
are not the only risk factors for Cardiovascular Disease. Other
factors (effects on inflammatory
Prostaglandins
) alter these risks, probably
to a greater degree.
-
Triglyceride Levels
-
Hydrogenated Corn Oil
feeding results in
higher
Triglyceride
levels
than with Natural Oils or Butter
-
Saturated Fatty Acid
has
little effect on
Triglyceride
levels
if substituted for
Cis-Unsaturated
-
Trans Fat Effect on
Coronary Disease
-
"Artificial"
(Hydrogenated) Trans Fat
-
LDL
/
HDL
Ratio
for
Trans Fat
is
twice that for Saturated Fat
-
Trans Fat
increases
LDL
and
decreases
HDL
-
Saturated Fat
raises
LDL
only
(and depending on chain length,
some lower or do not affect
LDL
)
-
Severe Coronary Risk:
30,000 premature Coronary Heart Deaths
attributable to
Artifical
Trans Fat
-
Per capita consumption
has not changed
greatly since the 1960’s
because of the
increased use
in commercially-baked and fast foods
-
"
Natural"
Trans Fat
are found in
Dairy
and
Beef
(5%). These have
different properties from the
artifically
produced ones.
-
Trans Fat Effect on
Long Chain Essential Fats
(EPA,
DHA
)
-
Trans Fats
inhibit
the conversion
of
AlphaLinoleic
Acid (
LNA
)
to longer-chain Omega-3's
Eicosapentanoic
Acid (EPA)
and
Docosahexaenoic
(
DHA
)
-
This reduces the availability of
DHA
and
EPA
in Arterial cells, potentially
enhancing the development of
Coronary Heart Disease
.
-
Trans Fats appear to
interfere
with Fetal Growth and Length
of Gestation
, indicated by an
inverse correlation
between the
TFA
and
DHA
levels in the circulation of Infants (Elias and
Innis
2001). [38b]
-
PUFA
(
Cis
Double Bonds):
Coronary Disease
-
Polyunsatruated
Fat:
increases
Atherosclerosis
[29j,96]
-
Although
Polyunsaturated Fats
are
protective
against
Cardiac
Arrhythmias
(
LNA
or its metabolites appear to decrease Cardiac
Arrhytmias
), a study of post-menopausal women with a relatively
low fat intake showed that
Polyunsaturated Fat
was
positively
associated with
progression of
Coronary Atherosclerosis
.
Monounsaturated Fat (
MUFA
)
was not
.
-
This probably is an indication of the greater vulnerability of
Polyunsaturated Fats to
Lipid
Peroxidation
.
The greater the degree
of unsaturation in a fatty acid (
ie
, the more double bonds in the fatty acid),
the more vulnerable it is to lipid
peroxidation
(rancidity). Antioxidants can
protect unsaturated fat from lipid
peroxidation
.
-
The greater the degree of
Unsaturation
(more double bonds) in a Fatty Acid,
the more vulnerable it is to lipid
peroxidation
(
rancidity
).
-
Antioxidants
can protect unsaturated fat from lipid
peroxidation
.
Vitamin E has been shown to be protective against this.
-
Atherosclerosis Mechanism
[132]
-
Plaque Initiation
-
Plaque Progression
-
Monocyte
adherence
-
Monocyte
invasion
-
Monocyte
transformation to Macrophages
-
Accumulation of Lipid Products to Macrophage
Mebrane
Receptors
and
Internalization of Oxidized
Low-Density Lipoproteins (
LDL
).
-
Plaque Rupture
-
Essential Fatty Acids (
Cis-Unsaturated
Double Bonds
)
[37,38-38c,41a]
Essential Fatty Acids (
EFA
)
are
Cis-Unsaturated
Fatty Acids. When ingested,
they can be converted to longer chain Unsaturated Fatty Acids
required
in Humans
(Omega-6 and Omega-3)
.
-
Omega-6 & Omega-3 Essential Fatty Acid Families
(82 Harris)
-
Essential Fatty Acids
further
convert
to important
Eicosanoid
Products [27]
-
Omega-3 Fatty Acids
[37]
-
The
Omega-3
FA Series
begins with
Linolenic
Acid
(
LNA
/ALA 18 carbons
).
-
Linolenic
Acid
is ultimately
metabolized
to
DHA
(22 carbons) [163a]
-
Linolenic
Acid
can refer to
two
completely different substances:
-
Alpha-Linolenic
Acid
(
LNA
or ALA)
is an Omega-3 fatty acid found in some vegetable oils.
Linoleic
Acid
usually refers to this
forn
.
-
Gamma-Linolenic
Acid (
GLA
)
is an Omega-6 fatty acid in the
Lineleic
Acid series
-
Omega-3
Fatty Acids
are
AntiInflammatory
,
AntiThrombotic
,
AntiArrhythmic
,
HypoLipidemic
,
and
Vasodilatory
.
-
LNA
deficiency
causes
scaly skin
,
hair loss
, and
slow wound healing
-
There is evidence that Omega-3 is essential for Brain and Retina development [75]
-
Sources of
Linolenic
Acid (
LNA
)
-
LNA
comes from Greens, and Animals that eat greens (Flaxseed, Fish Oil, Canola, Soy, Walnut,
Grass-fed Cow Milk/Meat) [92b,92h]
-
LNA
is found in in large quantities in
Flaxseed Oil
(55%) and in
Canola Oil
(10%) and
Un-hydrogenated
Soybean Oil
(7%).
-
Estimate
LNA
=1g/day
needed
-
Most
LNA
is consumed in
Energy
production via
Beta-Oxidation
. [38a]
-
EPA/
DHA
-
LNA
converts to EPA
, further forming 3-series
TX's&PG's
,
decreasing
Inflammation
-
A very small fraction of ingested
LNA
is
converted
into
Eicosapentanoic
Acid
(
EPA
/20 carbons), with a smaller fraction further converting to
Docsahexanoic
Acid
(
DHA
/22 carbons)
-
Some
LNA
is
converted
to
EPA
and
DHA
in Humans
-
Hi LA
(Corn, Safflower OIL)
lowers the conversion of
LNA
to EPA&
DHA
by
using up the del6desaturase.
-
Del6desaturase is inhibited by
Artificial Trans Fats (Hydrogenated Oils), Insulin, and increased Age
.
-
Del6desaturase has a higher affinity for
LNA
than LA, however.
-
Better to
shift from Hi-w6 to Lo-w6 Oils
(Olive, Coconut, Avocado Oils, Grass-fed Organic Butter).
-
Omega-6 Fatty Acids
[41a]
-
The
Omega-6
FA Series
begins with
Linoleic
Acid
(
LA/20 carbons
).
-
Omega-6
Linoleic
Acid
metabolizes to
Arachidonic
Acid
(AA, 20:4n-6),
which accumulates to very high concentrations in a wide variety of human tissues and cells.
-
Arachidonic
Acid (AA)
-
Metabolism of
Linoleic
Acid (LA) to
Aracidonic
Acid(AA):
Enzymes alter the Essential Fat structures step-wise,
desaturating
and
elongating, to produce
required
Fatty Acids.
[41]
-
Omega-6 (w-6) Fatty Acids
are
ProThrombotic
and
ProAggregatory
,
with
increases
in
Blood Viscosity
,
Vasospasm
, and
Vasoconstriction
.
.
-
While
small levels of AA
in the body do have some important functions,
such as in reproduction and other processes, excessively
high levels of AA
are considered to be potentially problematic in the development and/or
progression of some chronic health conditions.
-
LA is the precursor to AA
[see: Omega Pathways - More Details]
-
Dietary LA is considered the primary source of AA
-
LA maintains membrane flexibility
-
LA increases Vitamin E requirement
-
Soy diet
(high in LA) reduces conversion of LA to AA [131]
-
AA
converts to
TX&PG's-series2/
Cycloxygenase
&
LT-series4/
Lipoxygenase
,
which
promote
inflammation
,
blood clotting
, and
smooth muscle contractions
-
High LA
inhibits conversion
of
AA
to Inflammatory
PG
series
-
High PGE2(inflammatory) induces a switch from the 15-
Lipoxygenase
product of AA, LeukotrieneB4
, to LeukotrieneA4 and
Lipoxin
A4.
This counters inflammation and stops
polymorphonuclear
infiltration,
resulting in the resolution of the inflammatory process in skin. [132]
-
LA: Breast Cancer [41a]
A high consumption of omega-6 polyunsaturated fatty acids (
PUFAs
),
which are found in most types of vegetable oil, may increase the likelihood
that postmenopausal women will develop Breast Cancer. Similar effect
was observed on Prostate Cancer.
-
Sources of
Linoleic
Acid (LA)
-
The primary dietary
Omega-6
FA is
Linoleic
Acid
(
LA/18 carbons
). It is found in abundance
in liquid vegetable oils, with Safflower containing about 75% by weight and Corn Oil about 50%.
A small portion of LA is converted to AA, a
precurser
to an array of
Eicosanoids
(20 carbon metabolites).
-
Other Oils and Foods that contain
Linoleic
Acid
include Poppy seed Oil (70%), Walnut Oil,
Palm Oil, Sunflower Oil (63%), Soybean Oil (50%), Peanut Oil (29%), Canola Oil (25%),
Egg Yolks (16%), Olive Oil (3-21%), Lard (10%), Grass-fed Cow Milk(3%),
Coconut Oil (2%), Okra, Rice Bran Oil, Wheat germ Oil, Grape seed Oil, Macadamia Oil,
Pistachio Oil, Sesame Oil. [120]
-
It is estimated that 2-6 g/day LA
needed (Commonly diet has 10-20g). However,
University of
Toronto scientist, Stephen
Cunnane
discovered that the seminal research used to determine the
dietary requirement for
linoleic
acid was based on feeding animals
linoleic
acid-deficient diets,
which were simultaneously deficient in
n
-3 fats. The
n
-3 deficiency was not taken into account
.
The
n
-6 oils added back systematically to correct the deficiency also contained trace amounts of
n
-3 fats.
Therefore the researchers were inadvertently correcting the
n
-3 deficiency as well. Ultimately,
it took more oil to correct both deficiencies. According to
Cunnane
,
this error overestimates
LA requirements by 5 to 15 times
. [120,41a]
-
Food sources of Essential Unsaturated Fatty Acids
Vegetables contain c18 Fatty acids, while Marine sources have mostly longer c20
and c22 Fatty Acids. [92a,121]
-
OMEGA PATHWAYS: More Detail
Omega3 Metabolism
:
LNA
(18:3)>EPA(20:5)>
DHA
(22:6)
Omega6 Metabolism
: LA(18:2)>
GLA
(18.3)>
DGLA
(20:3)>AA(20:4)
-
In a healthy body, a portion of the
alpha-linolenic
acid (
LNA
) consumed is
converted
into two forms
that your body can more readily utilize,
DHA
and EPA
. Unfortunately, this process, which is governed
by a particular enzyme (
delta-6
desaturase
), is significantly inhibited (up to 50% or more) by an
overabundance of
Linoleic
acid. The enzyme is literally
“used up”
in the
desaturation
process
involved in getting rid of excess omega-6 fats, as found in Sunflower Oil and Corn Oil, etc.
The enzyme is no longer available for converting
LNA
to it's more usable cousins,
DHA
and EPA.
-
In addition, the delta-6 enzyme is also inhibited by the
Trans Fatty Acids
found in Hydrogenated Oils,
Margarine, Shortening, and Refined Oils – all significant components of the modern diet. Delta-6 is further
inhibited by high levels of
Insulin
, a problem in large percentages of civilized societies where obesity
and diabetes are soaring. In America, two-thirds of the population is now considered overweight.
-
Finally, the process of delta 6-
desaturation
of
Linoleic
and
Alpha-Linolenic
Acids
slows with aging
. [92a]
-
Long Chain Omega3s (
DHA
,EPA)
Suppress
Inflammatory
Prostaglandins
from the Omega6/AA Pathway
(adapted from [38])
-
PG's
have
different effects depending on the Tissue
. [77]
PGF2a
, for example decreases Progesterone, which triggers labor in pregnant women.
-
Anti-inflammatory
processes must always continuously counter
the normal inflammatory processes.
-
Although most Americans obtain an
excess of
Linoleic
Acid
, often it is
not converted
to
GLA
because of
metabolic problems
caused by diets
rich in Sugar, Alcohol or Trans Fats from processed foods, as well as smoking,
pollution, stress, aging viral infections, and other illnesses such as diabetes. [80]
-
EPA
and
DHA
(w3
EFA
)
reduce
Inflammatory
Prostaglandins
.
-
Health Effects of Essential Fatty Acids
[37,38]
-
Beneficial Health Effects of
w-3 Fatty Acids1
-
Secondary Prevention of:
-
Coronary Heart Disease
-
Hypertension
-
Type 2 Diabetes
-
Some Benefit in:
-
Renal Disease
-
Rheumatoid Arthritis
-
Ulcerative Colitis
-
Crohn
disease
-
Chronic Obstructive Pulmonary Disease
-
Beneficial Health Effects of
w-3 Fatty Acids2
-
Membrane Fluidity/Omega-3 [96]
-
Cell membranes of mammals
have a higher composition of
Long Chain
Polyunsaturated Fat
(
DHA
, w-3 fatty acid) and a lower composition of
Monounsaturated Fat than reptiles. Higher Polyunsaturated membrane
content gives
greater membrane fluidity
(and functionality),
commensurate with the higher metabolic rate of the warm-blooded species.
-
In
Fish
, however, increasingly cold environments lead to increasingly high
cell membrane content of
both Monounsaturated and Polyunsaturated
fatty acids, presumably to
maintain greater membrane fluidity
(and functionality) at the lower temperatures.
-
Alpha-phosphatidylcholine
(
omega-3
double bonds at delta 9, 12, and 15) and
Gamma-phosphatidylcholin
e
(
omega-6
double bonds at delta 6, 9, and 12)
differ only in the location of the
unsaturations
in one fatty acid chain.
-
The
gel to liquid
crystalline phase transition for
Omega-3
/Alpha-PC
membranes exhibits broad
hysteresis
near -9
degC
on heating, and
-20
degC
on cooling.
-
In contrast,
Omega-6
/Gamma-PC membranes does not exhibit hysteresis
,
and occurs near a lower temperature of -27
degC
.
-
A different molecular ordering exists in the liquid crystalline state.
-
Beneficial Health Effects of
w-3 Fatty Acids3
-
Thermogenesis
/Omega-3
-
Studies suggest that Omega-3 fatty acids enhance
Thermogenesis
(the
burning of excess fat
to produce heat), thru "uncoupling protein-3"
-
Energy Storage/Omega-3
-
EFA
's
shunt glucose (from Carbohydrates) towards
glycogen storage/synthesis
,
at the same time directing Fatty Acids away
from Fat storage/
Triglyceride synthesis,
towards Fatty Acid Oxidation
-
Beneficial Health Effects of
w-3 Fatty Acids4
-
Prostaglandins
(PG)
:
w3 and w6
EFA
produce
Prostaglandins
&
Leukotrienes
thru
Cycloxygenase
&
Lipoxygenase
.[75-78]
-
Cycloxygenase
(COX1&2)/PG
-
COX1
-
produces
baseline
prostaglandins
-
COX1>PGE1 inhibited by ASA,
Indometh
-
Low dose ASA inhibits TXA2(COX1) from Platelets
-
Low dose ASA does
not
inhibit PGE2(COX2) from
WBC
-
COX2
-
produces
prostaglandins
through stimulation in
inflammatory
stimulations
-
NSAID's
causes erosive gastritis and renal toxicity by blocking
PGE2(COX2) in gastric
mucosa
-
Both COX1&2
-
both found in Blood Vessels, Stomach, and Kidneys
-
produce
TXA2 in the live
r.
TXA2
releases
TNFa
, and both
cause
Liver damage
-
Lipoxygenase
/
Leukotrienes
-
15-
Lipoxygenase
produces substances which appear to
decrease
Prostate Cancer
. [132]
-
Beneficial Health Effects of w-3 Fatty Acids5
-
Physicians Health Study [Harris 82, 83]
-
The Physician Health Study was a Population-based Case-Control Study that looked at Low
Red Cell Omega-3 (EPA+
DHA
Levels and Cardiac Death. The subjects in the highest
quartile for (EPA+
DHA
) Levels in Red Blood Cells were at a 90% lower risk of Sudden Cardiac Death.
(
JAMA
1995;274:1363-1367)
-
It is the w-3 content that decreases
Sudden Death
, not the w-6
PUFA
. Scientists suspect
that the major benefit of fish oil and omega-3-fatty acid is in preventing ventricular fibrillation
in event of a heart attack, as the Physician's health study found
no association
between omega-3-fatty
acid consumption and risk of developing
Non-fatal
coronary heart diseases such as heart attacks
without sudden death.
-
Health Effects of Saturated(
SFA
) vs Unsaturated Fats (PUFA
/TRANS)
-
Saturated Fat Good or Bad?
[29a]
-
Saturated Fats have
better
LDL
/
HDL
Ratios than Trans Fats
[139]
-
Heart and Saturated Fats
[136]
-
Stearic
Acid (c-18) and
Palmitic
Acid (c-16)
, found in
milk and meat products,
are the
preferred fuel
for the
Heart
, and is why Fat around the Heart is Saturated. The
heart
draws
on the reserve of fat in times of stress.
-
Saturated Fatty Acids
constitute at least
50% of cell membranes
. They give
membranes
stiffness
and
integrity
.
-
Saturated Fat
makes up
only 26%
of the Fat
in clogged arteries plaques
.
The balance
is
Polyunsaturated Fatty Acids.
Plaques
have more
w6-
PUFA
than
AdiposeTissue
does,
high in LA
and
low in
OA
. [157]
-
Saturated Fat
lowers
Lipoprotein(a) [LP(a)]
whch
lowers
Heart Disease
risk.
High
Lp
(a) in blood is a risk factor for coronary heart disease (
CHD
),
cerebrovascular
disease (
CVD
), atherosclerosis, thrombosis, and stroke.
High
Lp
(a) predicts risk of early atherosclerosis similar to high
LDL
,
but in advanced atherosclerosis,
Lp
(a) is an independent risk factor not
dependent on
LDL
. [140]
-
A study of
post-menopausal
hyperlipidemic
women with a relatively
low fat
intake showed that a
greater Saturated Fat intake
was associated with
less progression
of
Coronary Atherosclerosis
. [132]
-
A study of Portuguese males concluded that "
Total Fat,
Lauric
Acid,
Palmitic
Acid, and Oleic Acid intake
was
inversely associated
with
Acute MI
,
and a
low intake of Total Fat and
Lauric
Acid from Dairy products
was directly associate with MI. [132]
-
The
World Health Organizatio
n has determined that there is "convincing" evidence
:
[138]
-
Myristic
and
Palmitic
Acid
intake
increases the probability
of
Heart Disease
-
Lauric
Acid has
a
"possible" risk
for
Heart Disease
-
Stearic
Acid
has
no increased risk at all
for
Heart Disease
-
However,
Lauric
and
Myrystic
Acids have been shown to increase
HDL
in animal studies. [150b]
-
"...despite decades of research, it is still a debatable proposition
whether the consumption of Saturated Fats above recommended
levels by anyone who's not already at risk of heart disease will
increase the likelihood of untimely death.
"
(
Taubes
, US Surgeon General 2001) [132]
-
Breast Cancer and Saturated Fats [29k]
-
Long Chain
Saturated
Fatty Acids
(
LCSFA
)
inhibit
Breast Cancer
Cell
Proliferation. Long Chain
Unsaturated
. Fatty Acids
(
LCUFA
)
do not
have this
inhibition. This has also been demonstrated in
Spontaneous
and
Transplanted
Mammary Tumors
in mice and rats, and in
Breast Cancer Cell cultures
.
-
LCUFA
added to
LCSFA
in small amounts
did
not affect
this
Tumor
Supression
, depending on the amount of
LCUFA
added.
-
Stearic
Acid
increased
Spontaneous Mammary Tumor Development Time
in Mouse. This increase was
not observed
for
Laurate
(12)
,
Myristate
(14)
or
Palmitate
(16)
, suggesting that
Stearic
Acid(18)
inhibits
Breast Cancer
cell
proliferation.
-
OA
and LA (
LCUFA
)
show
inconsistent
Proliferation
results.
LA
actually
stimulates
cell proliferation
in cell culture models.
-
DHA
and
EPA
(
w3/
FO
) consistently shows
inhibition
of
Cell Proliferation
for
Induced Mammary Tumors
.
-
Other Saturated Fat Effects
-
Saturated Fat
protects
the
Liver
from
ETOH
and other
Toxins
, such as Tylenol!
-
Saturated Fat
enhances
the
Immune System
.
-
Short- and Medium- chain Saturated Fatty Acid
s are
Antimicrobial
in the digestive tract.
-
Long chain Omega-3
EFA
are
retained better
in tissues when the diet is rich
in Saturated Fat.
-
Low Saturated Fat
diets
prevents
Calcium absorption
. At least 50% of
dietary fat should be
Saturated
.
-
Mice fed Coconut Oil (high in Saturated Fat) tended to be leaner than mice fed
Soy Oil. [74]
-
Health Effects of Particular Essential Fatty Acids
-
LA Health Effects (Corn Oil)
[99,99a-f,102-105,104]
-
Cancer & LA
-
Linoleic
Acid (LA) enhanced, whereas w-3 fatty acids decreased, primary
tumorigenesis
.
Linoleic
acid also appears to be pivotal in the spontaneous
metastasis of experimental tumors. In addition,
Linoleic
acid increased the
proliferation of human breast tumor cells in culture. [99e]
-
Linoleic
Acid
in high amounts is associated with more than a
threefold greater
risk of
ER-negative Breast Cancer
than
ER-Positive
disease (OR=3.48). [99a]
-
Linoleic
Acid
stimulates the growth
of
T47D Breast Cancer Cells
with an increase in
the proportion of cells in the
S phase
. [105]
-
Linoleic
Acid
binds to
Estrogen Receptors
and
induce
certain
Estrogen
Inducible Genes
, creating an estrogen effect. [104]
-
Cholesterol
intake trends to a
lower
risk of
ER-negative disease
(OR=0.38)!
-
Arteries & LA
-
LA
increases
AA
by 40%
, LA
and
EDA
by 400% in
Endothelial Cells
-
LA
reduces
PGI2, PGE2, PGF2a
by 50-60% in Pulmonary Artery
Endothelial Cells
.
AA+LA
augments
this reduction.
(Does
LA+AA
increase
disease?).
-
TNFa
increases
PGE2
-
TNFa
+ LA
doubles
IL-1, a potent inflammatory
cytokine
. [132]
-
TNFa
+
(
SA
or
LNA
)
does not
have this effect.
-
LA and
OA
both
reduce
cell
Glutathione
,
increase
Albumen Transfer
,
increase
Membrane Permeability
, all inflammatory responses.
-
Plasma and aortic plaques are rich in LA but low in
OA
[132]
-
CHD
& LA
-
Linoleic
Acid
is considered
pro-Inflammatory
.
-
A
High-LA diet
(Jewish-Israeli) showed a
high
CHD
and
Cancer Incidence
compared to a
Hi-OA
/Olive Oil diet
(non-Jewish Israeli). [132]
-
9,10-Epoxy-12-
octadecenoic
acid (
EOA
), a metabolite of
Linoleic
acid,
causes cardiac arrest
in dogs, probably thru increased
Cardiac
Arrythmias
.
Other metabolites of
Linoleic
Acid also have
Toxic
effects. [105c]
-
The widespread public health support for a
high
Linoleic
Acid intake
is not
borne out by the literature, as carefully scrutinized by
Ravnskov
.
High
Linoleic
Acid intake
is
not associated
with
reduced
all cause mortality
,
as contrasted to
high
Linolenic
Acid intake
, which is.
Epidemiology
studies
covering <2 decades are, at best, unconvincing about the benefits of high
Linoleic
Acid (
PUFA
) intakes. [102]
-
Yam et al suggest that the
Isreali
Paradox - a high incidence of CAD,
Cancer and other degenerative diseases in Israel - may well be related
to high
Linoleic
Acid intakes.
-
In 2 blinded clinical trials, Animal and Saturated Fat was compared to Corn Oil.
Coronary events
were
less
(27%) in the
SFA
group vs
48% in the
CO
group. The second found a
reduction
of
CAD
with
increased
LA
that was
offset by a
doubling
of the
Cancer Rate
in the second half of the trial,
giving a
Total Mortality
that was
unchanged
.
-
Inflammation & LA
-
Linoleic
Acid
(but not Oleic Acid)
upregulates
production
of
Interleukin
-8
by
Human Vascular Smooth Muscle Cells via
Arachidonic
Acid Metabolites under
conditions of Oxidative Stress.
Preeclampsia
is
associated with
Oxidative Stress
,
elevated plasma levels of
Linoleic
Acid (LA
), and increased vascular smooth muscle
expression of the inflammatory
chemokine
,
Interleukin
-8 (IL-8)
. [105a]
-
No previous population has been exposed to the current high intakes of
LA thru Vegetable Oils and Soy- and Corn- based animal husbandry.
We may be experiencing the "
Linoleic
Acid Paradox", in which a "healthy"
Fatty Acid that lowers Cholesterol (LA) is associated with increasing rates
of Cancer and Inflammatory and Cardiovascular diseases. Low intakes of
ALA and other w3 Fish Oils in these studies compounds this paradox. [102]
-
Metabolism & LA
-
CPY1 and CPY2 P450 metabolize
Linoleic
acid
to
Monoepoxides
.
Linoleic
Acid,
Linoleic
Acid
monoepoxides
and the corresponding
diols
are all
cytotoxic
.
Monoepoxides
and
Linoleic
Acid
disrupt
Mitochondrial Function
. [105b]
-
Linoleic
Acid
helps
maintain
membrane
flexiblility
. [75]
-
International Society for the Study of Fatty Acids and Lipids
(
ISSFAL
)
consensus recommends an
upper limit
of
Linoleic
Acid
intake of 6.7 g/d
(3% of energy).
[102]
-
LNA
Health Effects (Fish Oil)
-
CHD
&
LNA
-
LNA
consumption of 2-3g/day
prevents
Primary and Secondary
CHD
[92b,102]
-
LNA
vs Butter
in Hamsters fed 12.5% lipids [5d]
-
Linseed Diet lowered Cholesterol (-29%),
LDL
(-35%),
HDL
(-17%),
Glucose (-20%), Insulin (-40%), and
LDL
/
HDL
ratios compared to the Butter Diet.
-
LDL
receptor concentration did not differ
-
There is a gender difference.
-
Note that
LNA
lowering
levels does not mean that Butter
raises
levels.
-
Breast, Colon, Skin Cancer &
LNA
-
LNA
appears to
decrease
the risk of
Breast and Colon Cancer
, and the
spread
of
Breast Cancer
and
Melanoma
.
-
Prostate Cancer &
LNA
-
Omega 3/6 Studies and Prostate Cancer
-
One study in in Uruguay linked
LNA
with
rapidly progressing
Prostate Cancer
and
Macular Degeneratio
n, increasing the risk 70% over control subjects (those that
did not receive
LNA
).
LNA
caused an
increase
in Prostate Cancer for those at
highest
LNA
vs lowest
LNA
(
Deneo-Pellegrini
,
De
Stefani
et al)
[92b,92e]
-
They found that those with the highest intake of ALA (
alpha-linolenic
acid,
an omega-3 fatty acid precursor found at high levels in flax seed) had a
440% increase in their risk of getting prostate cancer compared with those
at the lowest level. The incidence of prostate cancer in Uruguay has increased
by close to 80% in the last 50 years.
The Uruguayan diet is comprised largely of meat (a major dietary source of
LA, with some
LNA
), dairy, and lots of food fried in cooking oils such as
Canola oil (also a major dietary source of LA with some
LNA
) – and
virtually no flaxseed or unheated cold-processed flax oil
. [92a]
-
A Duke University Medical Center pilot study, published in the July 2001 issue of Urology,
suggests that
flaxseed, coupled with a low-fat diet, may help men reduce the
risk of prostate cancer
. The conclusions of the study were that even short-term changes
to a high-fiber/flax supplemented diet resulted in prostate cancer cells that didn't divide as
quickly as those in people not on the diet. And in men with early-stage cancers, a decrease
in
PSA
levels associated with the cancer was also noted. [92a]
-
A Korean study found that
low ratios of serum omega-3 to omega-6
polyunsaturated fats were associated with prostate cancer
, ranging from
0.89 for normal subjects to 0.71 for men with
BPH
to 0.50 for men with prostate cancer.
The
men with prostate cancer also had significantly higher levels of omega-6 acids
than did the normal men and the men with
BPH
. The researchers concluded that
their work supports the contention that
omega-6 polyunsaturated fatty acids have a tumor-promoting effect while omega-3 acids have a protective effect
.
(Clinical Biochemistry, Vol. 32, August 1999, pp. 405-09). [92a]
-
A large 2006 study found
no association
between total
LNA
intake and overall risk of
Prostate Cancer. [92b]
-
A 2007 study showed that 30 grams of flaxseed a day reduced prostate cancer growth [92f]
-
Explanation and Consequences
We have increased Omega-6
Linoleic
Acid
and
decreased Omega-3
Linolenic
Acid intake
dramatically. Our diets now include huge amounts of highly refined oils that are extracted from plants and used for cooking or in prepared foods.
These oils (such as corn oil, safflower oil, cottonseed oil, peanut oil, and soybean oil) are all high in the omega-6s
. As a consequence, we have dramatically decreased our intake of omega-3's as found primarily in whole grains, beans and other seeds, and seafood – now getting our omega-3’s primarily as the secondary fatty acid in our highly refined bottled oils. [92a]
-
We now get most of our omega-3s from foods that are ever higher in the omega-6 fatty acids, thus accounting for the increasing distortion of the fatty acid balance.
-
The oils that we are consuming (even our omega-3s) have been heated to high temperatures in the process of refining them and in the process of cooking. As we will see later, this is particularly devastating.
-
We have refined out the beneficial
phytochemicals
such as the
lignans
, which are an integral part of the oil complex, and which play a key anticancer role in the body
-
Since we rarely eat fresh food anymore, we are also now consuming an ever-larger portion of rancid (oxidized) fats in our diets, which produces a large number of cancer forming free radicals in the body. (Note: The less saturated a fat is, the faster it will go rancid – a particular problem for vegetable oils.)
-
Neurons &
LNA
-
Research has also suggested a major
Neuroprotective
effect
of
LNA
in in-vivo models
of both
global ischemia
and KA-induced
epilepsy
.
-
Inflammation &
LNA
-
Dietary
LNA
(w3)
decreases
AA
(
LNA
blocks
del4), but can increase release of
AA
in Pig Endothelium.
-
Retina &
LNA
-
Polyunsaturated Fatty Acids derived from LA and
LNA
appear to be important functional components of photoreceptor cell membranes, although in equal dietary concentrations,
LNA
are more important
. [146]
-
DHA
&
LNA
-
A
Lo-LNA
Diet (Peanut Oil/Hi-LA
) fed to rats
lowered
DHA
levels in
Uterus
Phospholipids
,
raised
DPA
levels compared to
Hi-LNA
Diet (
PeanutOil
/Hi-LA + Rapeseed Oil/
HiLNA
)
. Uterine Growth response to low dose of Estradiol was
less
in the Peanut Oil group).
-
GLA
/
DGLA
(LA metabolites) Health Effects
-
GLA
and
DGLA
are mainly obtained from LA
, which is then converted to
GLA
.
GLA
is further converted to
DGLA
, requiring Vitamins C, B3, B6, Zn, Mg. [90a]
-
DGLA
has
major health benefits
though,
not
GLA
.
-
Although most Americans obtain an
excess of
Linoleic
Acid
, often it does not
convert to
GLA
because of metabolic problems caused by
diets rich in
sugar, alcohol, or trans fats from processed foods, as well as smoking,
pollution, stress, aging, viral infections, and other illnesses such as diabetes.
It is best to eliminate these factors when possible, but some prefer to supplement
with
GLA-rich
foods such as borage oil, black currant seed oil, or evening primrose.
-
Diabetics
can't convert
GLA
to
DGLA
(del6desaturase inhibition).
GLA
supplementation
improves nerve function and may prevent diabetic nerve disease. The recommended
daily dose for diabetes it is
480 mg per day of
GLA
.
-
Omega-6/
GLA
supplements should
not be taken
with a seizure disorde
r, since
GLA
increases seizures.
-
GLA
should not be used in
pregnancy
, for it may harm the fetus or induce
preterm
labor.
-
Both AA and
GLA
induce
Apoptosis
in normal human skin
fiboblasts
, and abnormal
lymphoblasts
.
-
Atopic
Dermatitis is linked to
lowGLA
[92]
-
Normal cells are least affected.
-
WTK1-mutant p53 cells are most susceptible to the induction of
Apoptosis
,
independent of functional p53.
-
Cell cycle progression was similarly affected, with normal fibroblasts arrested in S and
G2/M phases after 48hour exposure to AA or
GLA
.
-
OA
Health Effects (Olive Oil)
-
Breast Cancer
-
Olive Oil (Oleic Acid,
OA
- Omega9)
reduces
Breast Cancer
risk from 55 to 30% [132]
-
Long-chain
PUFA
and
LA
had
no impact
on the
OA
reduction of Breast Cancer.
-
This suggest that
MUFA
provides the Cancer benefit.
-
Avocado
and
Soybean
diets
(LA&
LNA
- w3,w6
PUFA
)
were
Tumorogenic
.
-
EPA Health Effects (Fish Oil)
-
EPA
fed to mice
reduced
the mean tumor number of
Intestinal
Neoplasia
by 68% vs
OA
controls.
-
AA
added to EPA
abolished
the
tumor
supression
.
-
AA
and
PGE2
were
lower
in normal Intestinal Cells when fed
EPA
.
-
NATURAL-TRANS Fatty Acids: production in Cows
from Dietary FA
:
-
CLA
/TRANS Isomers of
Linoleic
and
Linolenic
Acids
[73-7c,121-124j]
-
Conjugated
Linoleic
Acid (
CLA
) is a mixture of isomers of LA
, formed as an
intermediate in the
biohydrogenation
of
LA to
SA
in Ruminants.
Example of a CLA: CLAc9,t11(w6)
-
CLA
is produced from
LA
,
LNA
,
GLA
and
TVA
through
bioconversion
in
Rumen(1)
and
Breast Fat Tissue(2)
. [
Kennelly
124]
-
LNA
and
GLA
bio-hydrogenate
to
CLAt9,c11
via
TVAt11(
Vaccenic
Acid)
and
SA
in the livestock Rumen.
-
TVA
accumulates in the
Rumen(1)
.
-
CLA
is also produced in the
Rumen(1)
as an intermediate via
TVA
.
-
TVA
is
transported
in the blood to
Breast Adipose(2)
tissue (the main site for its
bio-conversion
to
CLAt9,c11
(via del-9desaturase enzyme) and other
CLA
Isomer
s. [179]
-
Over 86% of tissue
CLA
in Beef originates from
desaturation
of TVA in
adipose. [124d]
-
More than 12 isomers
have been identified in milk and body fat from Rumens.
-
CLA
has two double bonds (isomers of
Linoleic
Acid).
CLA's
with one
trans double-bond are
bio-active
.
-
The
CLA
milk content varies throughout the year, higher in the spring and summer
when cows are grazing most fresh material. Levels are lower from cows fed silage.
The
CLA
content varies
greatly from a
low of 0.1% to a high of 2.0%
or
more of the milk, tissue or egg yolk lipids.
-
Milk
contains higher amounts of
CLA
than meat. This is probably related to the
high-concentrate, low-fiber diets fed to finishing cattle in the United States which
lowers
CLA
production.
-
There is very low
CLA
levels in blood.
-
CLA Major Isomers [121,124a,124f,132]
-
CLA
c9,t11
(
Rumenic
Acid)
is the major component of
Milk Fat
(
80-90%
Octadecadienoic
Acid
)
and Rumen Products.
CLAc9t11
is
preferrentially
incorporated into the
phospholipids
of cell
membranes and considered
anticarcinogenic
. [129]
-
CLA
c9,t12
and
TVA-
Trans11
are considered to be
beneficial
for health
-
CLA
t7,c9
is the second most prevalent isomer of
CLA
in
Beef Fat
(
8-15%
of total
CLA
).
It has not been well studied and is often not reported. [121]
-
CLA
t10,c12
, although biologically active, is present in amounts
less than 5%
of the total
CLA
.
LA (CORN Silage-based diet
)
increases
the amount of t10,c12
relative to c9,t11 to >90%.
-
CLA
c9,c11
is a
cis-isomer
that has
not been well studied
.
-
CLA
Health Benefits and problems
-
Research suggests these general
CLA
benefits: [74]
Increases metabolic rate
Decreases abdominal fat
Enhances muscle growth
Lowers cholesterol and triglycerides
Lowers insulin resistance
Reduces food-induced allergic reactions
Enhances immune system
-
CLA
is
anticarcinogenic
,
antiatherogenic
,
antidiabetic
,
antiadipogenic
. [124b]
-
CLA
reduces renal PGE2, inflammation and fibrosis
. [131]
-
CLA
+Calcium
reduces Pregnancy Induced Hypertension
(8.3% vs 41.7%) in patients
with a history of
preeclampsia
and a diastolic notch. [134]
-
CLA
has
antiproliferative
and
antiinflammatory
effects on
colonocytes
(Butyric Acid).
There is little uptake of the
CLA
formed in the intestine, but it appears to have local effects on
the intestines.[124c]
-
Studies using mixed
CLA
isomers show reductions in total cholesterol,
triacylglycerols
and
LDL
in blood from humans.
CLA
[129]
-
CLA
induces a
body fat loss
that is enhanced in mice fed coconut oil (high is saturated fat). [74]
-
CLAt10,c12
however,
lowered men's "good"
HDL
cholesterol, raised their blood sugar,
and
made them more insulin resistant
. [86] This may be do to
CLA's
anti-estrogenic effect. [74c,d]
Note that a low fiber feed for rumen increases CLAt10,c12.
-
Dietary Sources of
CLA
-
CLA
content of Foods [74b]
-
Eggs
are rich in
CLA
, and it has been shown that the
CLA
in eggs survives the high
temperatures encountered during frying.
-
Cheese
contains 80% of
CLA
as
c9,t11
.
-
Food products of grass-fed ruminants
(e.g.
lamb
,
beef
) are good sources, and
contain much more
CLA
than those from grain-fed animals. [73,86]
-
In fact, products from grass fed animals can produce 300-500% more
CLA
than
from those fed the typical diet of 50% hay and silage, with 50% grain.
Concentrations of
CLA
in the meat fat from Australia and Germany have
2-3x
the levels found in US Cattle
. [122]
-
To achieve biological effects, the average human would need to consume
5gms/day
of
CLA
. A single 3.5oz serving of grass-fed beef provides 1.2gms of
CLA
,
25% of this requirement.
Convential
grain-fed beef provides 0.5
gms
or 10% of the
CLA
requirement for a positive effect. [86]
-
Kangaroo meat
may have the highest concentration of
CLA
when compared with other foods.
-
Refrigerated storage and thermal treatment
results in significant decreases or
disappearance of some of the minor
CLA
isomers and a significant increase of
trans,
trans
isomers. [126]
- Trans Isomer Production in Cows: Simplified Diagram
CLA(c9,t11) and TVA(t11) are thought to have beneficial effects, while CLA(c10,t12) may
contribute to health problems. Grass feeding increases the CLA(c9,t11) and TVA(t11) content,
while Corn feeding increases the CLA(c10,t12) content.
-
T11 path
:
EFA
> TVAt11 &
SA
(in RUMEN) [121]
LA:
LA>
CLA
>TVA>
SA
LNA
:
LNA
>TVA>
SA
GLA
:
LA>
GLA
>TVA>
SA
- Rumen to Breast Bio-hydrogenation (t11) Pathways [122]
-
T10 Path:
EFA
to
CLAt10,c12
&
SA
(in RUMEN) [121]
LA:
LA>
CLA
>
SA
LNA
:
LNA
>
SA
GLA
:
LA>
GLA
>
SA
-
CLA
is
synthesized
de novo in Humans
from
LA and TVA
(as in
non-ruminents
),
thru
Intestinal Bacteria
. [121]
-
COLON
metabolism of Fatty Acids is thru Bacteria.
-
Dietary Fatty acids
are mostly
absorbed
in the
Duodenum
.
-
UFA
are
better absorbed
than
SFA
.
-
When
Sugar-Beet Fiber
is used as a food source for
Colonic
Bacteria, the primary
products are the
Saturated Fatty Acids
Stearic
and
Palmitic
Acid (60%)
, and the
PUFA
Linoleic
Acid and some Oleic Acid
. The
PUFA
appear to be protected from metabolism
to Saturated fats by incorporation into the bacteria membranes.
-
When
LA or
LNA
is added with sugar-beet
, they are hydrogenated to
Natural Trans products
. The bacteria can
hydrogenate
LA
and
LNA
, but
not
AA
.
-
The final product of LA metabolism in the Colon appears to be
Stearic
Acid
.
-
CLA
/TVA
Human
Synthesis from
Linoleic
Acid (LA)
-
Conjugated
Linoleic
Acid (
CLA
) production [124c]
-
Linoleic
acid(LA)
(
cis
-
9,
cis
-
12 18:2) is metabolized in the
Human Colon
(and in
Rumen
).
Humans have the
del-9-
desaturase
enzyme (
VA/TVA>
CLA
).
-
t10, t11 Pathways
in the
Human Colon
(and
Rumen
).
-
to
Conjugated
Linoleic
Acids(
CLA
)
(mainly
cis
-
9,
trans
-11)
-
to
Vaccenic
acid(VA
)
(
trans-
11/18:1)
-
to
Stearic
Acid
(18:0)
-
Other
CLA
isomers formed are the
c9t11
,
t9c11
,
t9t11
.
-
Hydroxy
CLA
Pathway
in the
Human Colon
(and
Rumen
).
-
Linoleic
(LA)
is also metabolized to
CLA
Hydroxy
Isomers
via a
second
new
10-
HydroxyCLA
Pathway
in the
Human Colon
and
Rumen.
-
LA
converts to
Ricolnoleic
Acid
(
RA
OH
10c12
, an 18:1Fatty Acid) [6a]
-
Stearic
Acid (
SA
) production [124c]
-
TVA
and other
t10 and t11 Path intermediates
are bio-hydrogenated to
Stearic
Acid
in the Rumen (see ahead).
-
Oleic Acid
is also
biohydrogenated
to
Stearic
Acid
in the Rumen. It forms
several Trans-c18 isomers, including TVA, during its
biohydrogenation
. It thus
increases the production of
CLA
and TVA in Dairy products. The oils and seeds
of peanuts, rapeseed, palm, coconut, hi-Oleic Sunflower which contain
OA
enhances
CLA
and
TVA
production.
-
Stearate
producing Bacteria
in Rumen have been hard to find, because they
are
sensitive
to the
toxic effects of
PUFA
.
The same may be true of Human
Intestinal Bacteria
.
-
More Detailed Diagram Showing Milk Fat (
CLA
/TVA) Synthesis:
NATURAL-TRANS
/
UFA
/
SFA
-
Ruminant Feedstuff Effects on
CLA
/ TVA Milk/Meat content
-
Forage
and
Concentrate
feeds typically contain relatively small amounts of Lipids as Fatty Acids. [121]
-
Forages
contain mostly
Phospholipids
and
Glycolipids
,
LNA
and LA
-
Forage Diets (Lo pH)
-
Lo pH
(5.5) has no double bonds beyond C10-16,
increases
OA
>
SA
, and
favors
Trans11
Isomers. [179b]
-
Pasture-fed Cow
s in the summer have
higher
CLA
milk content (2-3x the content of
Mixed-fed
winter or
Concentrate-fed
summer Cows).
-
Hay Feed
lowers
TVA
content compared to
Corn Oil
or
rumen-protected
CLA
Feed.
-
Plant Seed Concentrates
contain mostly
Triglycerides, LA and
OA
. [179b]
-
Hi-Concentrate/Low fiber diets (Hi pH)
fed to cows shifts from Trans11
to
Trans10
isomers.
-
Hi pH
(6.5) favors C18 double bonds in C6 thru c16 positions. A high percentage of LA is
converted to CLAt10,c12
rather than
-
Plant Oils (sunflower, corn, soybean, canola, linseed and peanut) increase
CLA
content. [121]
-
Supplementing feed with
rumen-protected
CLA
reduces
the conversion of
TVA to CLAc9,t11
and may
decrease
del9desaturase
in Adipose. [124d]
-
LA
converts to a high percentage of
CLAt10c12
-
LNA
(Soybean Oil) added to LA feed
increases
Total
Milkfat
and content of
TVA, CLAc9t11,
LCFA
, LA,
OA
, and
SA
and
decreases content of
SCFA
and
MCFA
,
LNA
and
PA
.This
decreases
the
Saturated-to-Unsaturated FA Ratio
and the
Atherogenicity
Index
. Soybean oil fed at 3.6% of the diet raised
CLA
levels 5x. [124,124i]
-
Oil additives affect Milk composition [121]
-
TVA, LA,
GLA
,
OA
,
LNA
(grass)
all
increase
TVA
and
CLA
in milk.
-
TVA
decreases
Saturated Fat
in
milk.
-
EPA (Fish Oil) supplement
increases
CLA
,
DHA
and
TVA
in milk, probably by
inhibiting
SA
formation in the Rumen.
EPA/
DHA
(Fish Oil)
added to
Corn Oil (LA)
or
Grass-grazing
increased
CLAc9,t11
in milk. [121]
-
Milk/Butter Fat
-
Basic Fatty Acid Content of Milk/Butter (Saturated/Polyunsaturated) [150a]
-
DHA
Longer Chain Content of Milk/Butter [121]
-
Regular milk contains
DHA
at 0.06% of Total Fat. 250ml (8oz) contains 3mg for 2% milk, and
5mg for whole milk.
-
The US Institute of Dietary Medicine recommends that
LNA
intake should be 1.2% of Energy
(2-4 gm/day).
DHA
+EPA is recommended to be 10% of Energy. This amounts to 127mg of
DHA
or EPA for adults, and 70 mg for children aged 1-3 years. If children aged 1-3 years drank
two 8-oz glasses of whole milk, they would get 50% of the recommended intake of
DHA
+EPA
.
-
Milk can also be enriched with
DHA
by 3 times, containing
DHA
at 0.18% of Total Fat. 250ml (8oz)
contains 10mg for 2% milk, and 16mg for whole milk.
-
Recommended
DHA
+EPA is estimated at 200-400mg/day, although higher intakes
may also be safe.
The UK Government advises eating one to two portions of oil-rich fish
per week, which will provide around 2-3g of the very long chain
n-3
fatty acids.
-
Butter Flavor [150a]
-
The five primary factors responsible for Butter's flavor include:
-
Fatty Acids
-
Lactones
-
Methyl Ketones
-
Diacetyl
/
dimethyl
sulfide
-
Human Colostrum Fatty Acid Composition
: [128]
-
The ratio of
Polyunsaturated to Saturated
Fats was
0.6
-
Monounsaturated
Fats are
40%
-
Saturated
Fats are
38%
-
Polyunsaturated
Fats are
22%
-
LA=15%
,
LNA
=0.9%
,
AA=1%
,
DHA
= 0.4%
-
The ratio of
w-6 to w-3
Fatty Acids was
8
-
Dietary Fatty Acid
composition
affects
the
Lipid Content
of Milk.
-
Mothers consuming
Organic Milk
and
Meat
products have 50% higher
Rumenic
Acid (TVA) in their Breast Milk. [5a]
-
Rats consuming
CLA
enriched Butter Fat had
higher
Mammary
and tissue
CLA
, and
lower
rate of Mammary Tumors
(-53%)
-
Big Picture: Essential Fatty Acid Synthesis Interconversion Graphic
:
Saturated /
MonoUnsaturated
/ Natural Trans /
PolyUnsaturated
Fatty Acids
-
Food Oil Comparisons
-
Oil Measure
-
1 tablespoon
= ~
15gms
=
1/2 oz
-
Fatty Acids in Vegetables Oils
(
Bronner
) [158]
-
Omega-3/Omega-6 Ratios in Whole Food (approximate)
[38]
-
Omega-3/Omega-6 Feeding of Livestock
-
Eggs
produced by Chickens fed a diet of
Greens and Insects
produce
higher levels of Omega-3
Fatty Acids
(mostly
LNA
) than Chickens fed
Corn or Soybeans
. [37]
-
Grain-Fed Beef
has a Ratio of
4:1
Omega-6 to Omega-3
Grass-Fed Beef
has a Ratio of
2:1
Omega-6 to Omega-3
,
making it a better source of Omega-3. [41]
-
The reason that
grassfed
animals have more omega-3s than
grainfed
animals is that
omega-3s are formed in the green leaves (specifically the
chloroplasts
)
of plants
. Sixty percent of the fat content of grass is a type of omega-3 fatty acid
called
alpha-linolenic
or
LNA
.
When cattle are taken off grass and shipped to a feedlot to be fattened on grain, they
lose their valuable store of
LNA
as well as two other types of omega-3 fatty acids,
EPA and
DHA
.
Each day that an animal spends in the feedlot, its supply of
omega-3s is diminished
. [41b]
-
Lamb
is almost always
Grass-Fed
, and subsequently
higher in
Omega-3
than other common meat sources. [37]
-
Milk and Cheese
from
Grass-Fed
Cows also
good sources of
Omega-3
.
O
ne UK study showed that half a pint of
Milk
provides 10%
, and small piece of
Organic Cheese
provides up to 88%
of the
LNA
requirements.
[37]
-
Corn Oil
[102-103]
-
Corn Oil
is a
poor source of
LNA
.
-
Corn Oil
(LA)
decreases
Saturated Fatty Acids
and
Cholesterol
-
Spatial Learning [103]
-
Fish Oil is better than CO in improving spatial memory in rats following recurrent
pentylenetetrazole
induced seizures.
-
Rats fed dietary
Fish Oil
performed better
than those fed
Corn Oil
in the
Morris Water Maze
,
a test used to examine Spatial Performance in rats.
-
the
FO
group had shorter escape latencies during the escape test.
-
the
FO
group stayed a longer time and swam a longer distance in the target quadrant in the spatial probe test.
-
the
FO
group had higher brain
DHA
and lower brain
DGLA
and AA levels.
-
the
FO
and CO groups did not differ significantly with respect to neuronal cell loss in the
histomorphology
study.
-
FO
and PCB have some similar effects on Spatial Learning in rat pups.
-
Soybean Oil
-
Soybean Oil
has a high amount of
Oxidation prone
PUFA
(
LNA
+LA >60%).
-
Soybean Oil is high in Vitamin E (anti-oxidant gamma-tocopherol)
-
To produce Soybean Oil, the Soybeans are cracked, adjusted for moisture content,
rolled into flakes, and solvent
extracted with
Hexane
. The oil is then
refined
,
blended
and sometimes
hydrogenated
.
-
Soybean, peanuts and other legumes replenish the soil with nitrogen and minerals.
-
Hi-Oleic Soybean Oil
-
HOSO
contains more than 80% Oleic Acid, 2%
Linoleic
Acid, 3%
Linolenic
Acid and
exhibits improved heat and oxidative stability over normal Soybean Oil.
-
HOSO
is resistant to Oxidation.
-
Hi-Linolenic
Soybean Oil (>50%)
-
Genetic engineering also produces Soybean Oil with high levels of
Linolenic
Acid.
-
Lo-Linolenic
Soybean Oil (3 vs 7%)
-
Lo-LNA
Soybean Oil
has
less
Trans Fatty Acids
(10% vs 2.5% of energy) than
Hydrogenated Soybean Oil.
-
Lo-LNA
Oil
has
less
Saturated Fat
than
Partially-Hydrogenated Oil
.
-
Lo-LNA
Oil
resists
Oxidation
.
-
Lo-LNA
Oil
has
similar
Free Fatty Acids
to other traditional oils.
-
However,
Hydrogenated-Lo-LNA
Soybean Oil
has
greater
Free Fatty Acid content
than
Unhydrogenated-Lo-LA
Soybean Oil
and
Partially-Hydrogenated Soybean Frying Oils
.
-
Newer varieties of Soybean have
Ultra-Lo (1%)
Linolenic
Acid
.
-
Lo-Saturated Fat Soybean Oil
-
Lo-SFA
Oil has 8 vs 16%
SFA
.
-
Olive Oil
[164-179f]
-
Olive Oil Categories
[179d]
Extra Virgin Olive Oil
refers primarily to the
acidity
of the oil being less than 1%.
In general, the lower the acidity the higher the quality of oil.
Hi quality
EVOO
is from
the first pressing of the olives, without using heat (a cold press) or chemicals, and
has no "off" flavors. Today the vast majority of oil is made in continuous
centrfugal
presses. There is no second pressing.
-
Extra-Virgin
olive oil
exhibits antioxidant properties
, conserving all of the
lipidic
and antioxidant qualities of the olives. They contain high amounts of
non-fats, including phenolic compounds and
tocopherols
(anti-oxidants).
Extra Virgin is made from olives just like Virgin, with the only difference being
the amount of acidity. Extra Virgin can have no more than 1% acidity.
These oils have the highest levels of
polyphenols
and Omega-3 Fatty Acids,
and the lowest levels of Saturated Fats and Omega-6 Fatty Acids.
Hi
Polyphenols
give a
longer shelf life
.
[Premium
EVOO
has
FFA
<0.3%,
EVOO
has
FFA
<1%]
-
Virgin
olive oils contain slightly less amounts of phenolic compounds and
tocopherols
.
[
VOO
has
FFA
<1.5%]
-
Refined
olive oil loses most of these beneficial properties during refining procedures,
but retains a
similar fatty acid composition as Extra Virgin olive oil
.
Over 50% of the oil
produced in the Mediterranean area is of such poor quality that it must be refined to
produce an edible product. No solvents are used to extract the oil; it is refined using
charcoal and other chemical and physical filters
[Refined has
FFA
<0.3%].
-
Blended
Olive Oil
is a mixture of the refined oil with minor amounts of Virgin oil resulting
in the typical green color and flavor similar to that of the Virgin oils.
"Olive Oil"
is blended
with cheaper Refined oil and
EVOO
. It
used to be call
Pure Olive Oil
.
Light Olive Oil
is highly Refined oil that has been steamed, bleached with peroxide, and then blended
with small amounts of lesser quality virgin or extra virgin oil. Sometimes
Oilve
Oil is
blended with Canola or other Vegetable oils. This should be stated on the
label.Illegal
blending of cheaper Hazelnut Oil can be profitable and is difficult to detect.
[Blended has
FFA
<1.5%]
-
Lampant
, Crude, Olive-pomace
oils are non-edible due to high Free Fatty Acid content.
-
Olive Oil Quality
Oils from fully
ripe olives (black
), olives grown in
poor soil
, and olives grown in
hotter climates
have
higher Saturated Fat and Lower
Polyphenol
concentrations than from
unripe (green)
olives
or those grown in
cooler climates
.
Tuscany and Umbria
produce greener, more fruity
and pungent flavored oils because these are harvested and produced from olives that are
the most immature.
Liguria
, Provence, and
Apulia
have olives that are more golden in hue,
are sweeter and have a nuttier flavor.
-
EVOO
has no Saturated Fatty Acids with greater than 18 carbon atoms.
-
Olives contain Iron, Vitamin E and Copper
-
Olive Oil has no Trans Fats
-
EVOO
gives higher Triglycerides than Refined Olive Oil, and raises Free Cholesterol in
HDL
.
-
EVOO
increases membrane
OA
in cholesterol esters and
phospholipid
esters
-
EVOO
improves
glycemic
control
-
Early harvest oils often have a longer shelf because of the higher
polyphenols
and antioxidants,
and are blended and are blended with late harvest oils to improve their shelf life.
-
Green olives have slightly less oil, more bitterness and can be higher in
polyphenols
.
The oil tends to be more expensive because it takes more olives to make a bottle of oil.
-
Olives should be picked just before they ripen and milled the same day, as olives will begin to
ferment within 3-4 hours after harvest. The best olive oils are made from those olives that have
been harvested by being hand-picked or by beating the branches with a stick. It takes 1500
to 2000 olives to make a quart of oil.
-
Good Olive Oil should smell fruity. It shouldn't have an offensive odor. If it passes the nose,
put it in your mouth. It should have a deep, Olive Oil flavor, a little bite to the throat. The taste
should linger, all characteristics of
EVOO
. Sweetness, mustiness indicate an old product.
-
The
United States
does not adhere to the International Olive Oil Council standards for olive oil.
"Extra Virgin" may be applied to any grade of oil. The label "Cold-Pressed Extra Virgin" is
not a guarantee of quality or composition. Whenever possible, choose expeller pressed,
unrefined oils [97,168]
-
Olive Oil Fatty Acid Content
-
Olive Oil is
55-80% Oleic Acid
, with <2.5% Free Acid, and
may contain 5-20%
Grape Seed Oil or Sea Buckthorn Oil
.
-
The
PUFA
content
of Olive Oil varies from the Mediterranean Region,
between 5 and 19%, with an average of 8% (as for Italian).
-
EVOO
has the highest natural content of
MUFA
(
OA
) which varies between 60-80% of total,
depending on the species
of olives. This makes it stable against
Peroxidation
. [166]
-
Linolenic
Acid
content of
OliveOil
is less than 1%. There is no problem if levels are higher than
that regarding nutritional value. But the International Olive Oil Society uses the
Linolenic
Acid
the
Linolenic
Acid to establish the authenticity of the Olive Oil. Seed oils like Canola have
higher levels of
Linolenic
Acid. More
PUFA
leads to a less stable oil. This is counterbalanced
by the levels of antioxidants that protect the oil.
-
Olive Oil (OO) Health Effects
-
Oleic Acid, the main monounsaturated fatty acid of Olive Oil, suppresses Her-2/
neu
(
erb
B
-2)
expression and synergistically enhances the growth inhibitory effects of
trastuzumab
(
HerceptinTM
) in breast cancer cells with Her-2/
neu
oncogene
amplification. [179e]
-
OO
stimulates
the secretion of
bile and pancreatic hormones
, and lowers the incidence of
Gallstone Formation. [179f]
-
Most of the dietary lipids in the Mediterranean basin, where consumption of Meat and Animal
Fat is low, come from Olive Oil. Other diets rich in Chicken and Pork meats provide similar
levels of Oleic Acid. [176]
-
In animals receiving
MUFA
, Fat breakdown is greater and Insulin's Blocking of Fat Breakdown
is Lower. Rats given
PUFA
as Soybean Oil had the opposite effect, lowering Fat Breakdown
and raising Insulin's Blocking of Fat Breakdown.
-
Smoke Point
is the temperature at which oil starts to burn [169]
-
EVOO
smoke point is 406
degF
-
Light Olive Oil smoke point is 468
degF
, and is less costly to fry with.
-
The smoke point varies with the Free Fatty Acid content of Olive Oil. The
lower the Free Fatty Acid content, the Higher the Smoke Point.
-
Hi Oleic Oils are engineered to have >90%
OA
. They perform well in medium to high heat
applications, such as deep frying or high heat sauteing.
-
EVOO
Increases Resistance of
LDL
to Oxidation
compared to refined
.
[179d]
-
Olive Oil Categories
[adapted from 168]
-
OA
metabolism
[179]
-
OA
is a precursor for several trans-C18:1 in milk, including trans10 and trans9 and others,
but trans10 predominates.
-
OA
>
SA
directly and via Trans monomers.
-
OA
does not convert to PA, LA,
LNA
in Rumen.
-
OA
>
SA
is increase with Lo ph in Rumen.
-
OA
>Trans is inhibited at low pH in Rumen.
-
OA
(Oleic Acid 18:1), LA(
Linoleic
Acid 18:2),
LNA
(
Linolenic
Acid 18:3)
Structure Comparison [179g]
-
Flaxseed
[92-92g,96]
-
Flaxseed
is cold-pressed Linseed oil without solvent extraction (no
Erucic
Acid)
-
LNA
content
of Flaxseed varies from (52-70%), with
covarying
LA
levels (24-3%)
-
Humans must obtain
LNA
from their diet
, because the 12- and 15-
desaturase
enzymes that make de novo synthesis from
Stearic
Acid
are
absent
.
-
Soybeans
are the largest source of edible oils in the US, 40% of which is
hydrogenated. All unsaturated fats produce Trans Fats when hydrogenated.
Low-LNA
Oils
provide Trans Free
alterrnatives
, some produced by blocking
the del6desaturase genes producing very low levels of
LNA
and LA, which are
more resistant to oxidation.
-
Flaxseed and its
lignans
appear to
decrease
Heart Disease
and the damage
from
Rheumatoid Arthritis
.
-
Flaxseed (not the oil)
also contains
Phytochemicals
, such as
Lignans
like
Secoisolariciresinol
,
a
Phytoestrogen
and Anti-oxidant
.
-
Flaxseed
reduces
the growth and
metastices
of established
ER-negative Human Breast
Cancer
in part due to its
Lignan
and
FishOil
components together, and not to decreased
Lipid
peroxidation
(Free Radical formation)
-
Flaxseed oil
has a
short shelf-life
(weeks) even when refrigerated. Rancid oils contribute
to
Free Radicals
and are
Carcinogenic
. Saturated Fats resist
Peroxidation
and rancidity.
Anti-oxidants may prevent this.
-
Flaxseed
supplement increase Omega-3 body levels
-
Canola Oil
[98]
-
Ca
nadian
O
il
L
ow
A
cid =
Canola
-
Canola is part of the mustard family whose other members include Broccoli,
Brussel
Sprouts, Cabbage, Kale and Mustard Greens.
-
Canola Oil is low in saturated fat, high in
mon-unsaturated
fat, with w3 and w6 essential fat.
-
Canola Oil 19gms(1.5 tablespoons)/day lowers Cholesterol, which is supportive
but not conclusive for a reduction in
CHD
.
-
Canola Oil is obtained from Rapeseed Oil by removing the
Euricic
Acid which is implicated in Cancer and Rancidity, and
Glucosinolates
which are
goitrogenic
.
-
Canola Oil
is often used as a
cheaper alternative
to the healthier Virgin Olive and
Grapeseed
Oils. Although Canola has at least some
Linoleic
Acid content, supermarket varieties of Canola Oil are often refined and processed with
chamicals
and heat, which destroy much of its
Linoleic
/
Linolenic
Acids. Cold-pressed,
unrefined
Canola Oil is a healthier type of Canola (sometimes pricier than Virgin Olive Oil), and found primarily in health food stores and specialty markets.
-
Peanut Oil
-
Peanut Oil is a stable, high mono-unsaturate oil. Peanut Oil is available
as a pure batch-pressed refined oil with a wonderful Peanut aroma.
-
Peanuts and their oils may contain carcinogenic substances
made by a fungus
that grows in damp peanuts. The fungus can infest other damp grains and seeds,
but peanuts are most
susceptable
because they grow underground.
If peanuts are fungus free, the oil is fine.
-
Cottonseed Oil
-
Potatoes fried in Cottonseed Oil
produce french fries that contain
less Trans Fat
than potatoes fried in Partially Hydrogenated Soybean Oil
or Partially Hydrogenated Canola Oil.
-
Palm Oil
[179]
-
Palm Oil is about 50% Oleic acid, similar to Olive Oil
-
Palm Oil has higher levels of
Palmitic
SFA
than Olive Oil.
-
Palm Oil maintains
desireable
plasma levels of Cholesterol and
HDL
/
LDL
.
-
Nutrient-Value
vs
Fry-Safety
(Oxidation Resistance)
-
Two competing characteristics of Fats for Cooking:
-
Nutrient Content
(more
EFA
, w3, etc.)
-
Want more
Mono-unsaturated Fats
-
Resistance to Oxidation
(Free Radicals, Trans Fat conversion)
-
Heat Resistance
-
Want less
PUFA
(
PUFA
tend to
oxidize)
-
Want more
MUFA
and
Saturated Fats.
MUFA
and
Saturated
Fats
tend to
resist oxidation
, so
MUFA
+Saturated Fat content
indicates oxidation resistance
-
Microwave Resistance
[52a]
-
Microwave exposure does not affect Free Fatty Acid Percentage
or Fatty Acid Composition
-
The
peroxide
content of
Virgin Olive Oil was lower
than for other
seed oils after Microwaving
-
Trans isomers (
Linoleic
+
Linolenic
Acid) were higher in Microwaved
Corn Oil versus Safflower Oil.
-
Examples of Oils to Obtain
EFA
Nutrition
(Omega-3&6)
-
Milk/Butter, Olive Oil, Fish Oil, Flaxseed Oil, Canola Oil
-
Examples of Oils for Frying
(Saturated Fat & Omega-9)
-
Coconut Oil, Beef Fat(grass fed), Lard, Olive Oil, Palm Oil,
Butter, Canola Oil, Peanut Oil
(from highest to lowest heats)
-
PUFA
Content
(NUTRITION)
-
MUFA
+
SFA
Content
(FRYING)
-
Saturated Fat Content of Oils
[27]
Differing Contents by Chain Length
-
Omega Fatty Acid Content of Fats and Oils (Summary Table):
[156-163e]
-
Vitamin B12 (and
Folate
)
-
Water Soluble Vitamin
s [65]
-
Cobalamin (Vitamin B12) Structure
[67]
-
Vitamin B12 is the largest vitamin, with a very complicated structure, but is water soluble. [60]
-
Vitamin B12 Coenzymes [64]
-
Vitamin B12
[22,60,63,67]
-
In humans, B12 exerts its physiologic effects on two major enzymatic pathways.
First, methyl-cobalamin (m-B12) is a cofactor in the conversion of
Homocysteine
to
Methionine
. This reaction is essential for the conversion of
dietary and storage (
methyltetrahydrofolate
)
folates
to
tetrahydrofolate
.
Second,
adenosyl-cobalamin
(aB12) is a cofactor in the conversion of
Methylmalonyl
coenzyme A (
MMCoA
) to
Succinyl-CoA
.
-
B12 is required for
growth
,
cell reproduction,
hematopoesis
, DNA
and Myelin synthesis.
-
Obtained
only from meat, fish, eggs, dairy products, or sea algae
-
Produced by
microrganisms
in the soil and sea
-
Stored in the Liver, Kidney
-
R-Protein
,
Intrinsic Factor
and
Stomach Acid
are required for absorption
-
Non-food supplement
s provide a small percentage absorbed by diffusion
without intrinsic factor
-
Enterohepatic
circulation
may eliminate
non-functional B12 analogues
-
B12
crosses
the
blood brain barrier 3 hours
after absorption and enters the brain
bound to
TransCobalamin
II (
TCII
), thru an adsorptive endocystosis
. There it is
converted to its
active Methyl and
Adenyl
forms
.
-
B12 Deficiency Syndromes
-
B12 Clinical Deficiency: Signs and Symptoms
[22,63,66]
-
Lethargy
-
Red Cell Anemia
-
Thrombocytopenia
-
Increased
LDH
-
Irritability, Depression
,
Hypomania
,
Personality changes,
Memory loss, Diminished Intelligence, Dementia, Psychosis
-
Decreased sensation
,
Loss of Bowel and Bladder control
,
Optic Atrophy
-
Dyspepsia
: Patients with a B12 deficiency from H. Pylori infection showed an
increased gastric emptying time of 230min, which decreased to 98min after
treatment with B12-
IM
/PO for 80 days. The severity of Intestinal symptoms
also went down 78%. [66]
-
B12 Clinical Deficiency: Anemia and Neuropathy
[22,63,67,71,72]
-
Cobalamin deficiency
causes a well known
Megaloblastic
Anemia
and
less known
Neuropathies
.
-
Cobalamin neuropathy
affects the
Cerebral Cortex
,
Spinal Cord
and
Peripheral Nerves
.
-
Neuropsychiatric disorders
, which are reversible with B12 therapy,
may occur in elderly subjects
without evidence of Anemia
. This may be
due to
demylenation
of peripheral nerves, the spinal cord, cranial nerves,
and the brain.
-
Adult B12 deficiency
is distinct from
Chilhood
B12 deficiency.
-
Folate
deficiency causes an identical Anemia to B12, but does not appear to
cause a direct Neuropathy.
-
High
Folic Acid
levels combined with
low
B12
levels is surprisingly
associated with
significant
cognitive impairment
among the elderly
in one study. [54c]
-
A setup for
DNA Synthesis
without
Methylation
Reactions?
(see
B12 First Pathways ahead).
-
Folate
vs B12 Deficiency
and
Depression
[69]
-
Folate
(B9)
deficiency appears most connected with
Depressive Disorders
(low 5-
hydroxytriptamine
)
-
Cobalamin (B12)
deficiency appears most connected with
Psychosis
-
B12 Clinical Deficiency:
Homocysteine
[72a]
-
Homocysteine
is
vasculotoxic
.
-
B12 Deficiency Factors:
[23]
-
Food-B12
Malabsorption
is responsible for up to 50% of deficiencies,
with Pernicious Anemia only a minority of cases. [66]
-
This includes infection with H. Pylori
-
Small intestine bacterial overgrowth in the elderly
-
Antacids, proton-pump inhibitors (decreases stomach acid)
-
Metformin
, antibiotics,
anti-convulsants
-
Vegans
at high risk (
enterohepatic
circulation)
-
High prevalence in elderly (up to 40%)
-
Helobacter
Pylori lowers B12
[54]
-
Major cause of duodenal ulcers, gastritis
-
Decreases stomach acid, exacerbating Vitamin B12 deficiency
-
Serum H Pylori Antibody
prevelance
in Community Based Clinic:
-
[B12 140-180] 92%
HPylori
seropositive
-
[B12 180-250] 87%
HPylori
seropositive
-
[B12 >250] 51%
HPylori
seropositive
-
Antibodies
prevent B12 absorption
-
Anti-Parietal Cell Antibody
-
Anti-Intrinsic factor antibody
(Intrinsic Factor Blocking Antibody)
-
Microwave Cooking
/ Food Processing lowers food B12 content
[49-52]
-
Microwave cooking causes appreciable loss of Vitamin B12 (~30-40% in 6
mins
)
in foods due to heat degradation
-
Boiling milk for 2-5
mins
has a similar degradation
-
The major food form of B12,
Hydroxy-Vitamin
B12,
degrades on microwave heating.
The 3 degradation products of Hydroxy-B12 have essentially
no activity
-
Other milk and dairy processing reduces B12 activity: Ripened Hard Cheese/Yoghurt(40%),
Cottage Cheese (82% - loss of whey)
-
B12 and Nitrous/Nitric Oxide: General Anesthesia, Infection, Trauma
[2-2d]
-
Ado
-Cbl
and
Me
-Cbl
forms of Cobalamin are very light sensitive, whereas
CN
-Cbl
and
H2O
-Cbl are not. Photolysis of
Ado-Cbl
and
Me-Cbl
, sources of B12 at the cellular level, yields
Aquocob
(II)
alamin
, which combines rapidly with O2 or NO. The Co(II)-
02
complex oxidizes instantaneously to give
Aquocob
(III)
alamin
, while Co(II)-
NO
oxidizes slowly to give
Co(III)-NO
. The Co(III)-NO bond is very stable, with no dissociation noted after 24 hours at 23°C or 37°C or after exposure to bright light. Indeed, it was nearly impossible to break the Co(III)-NO bond.
-
Abnormally high levels of NO may be produced in vivo in humans in various conditions, including
infection
,
septic shock
, and
trauma
, or after receiving
Interleukin
-2
for treatment of cancer. Also, NO (as a gas or as a
prodrug
) is administered therapeutically
transcutaneously
, intravenously, orally, and by inhalation. In these circumstances, it is possible that the NO might diminish the enzyme cofactor abilities of
Cobalamins
and produce a
functional vitamin BI2 deficiency
state. also, loco-regional NO overproduction in critical sites might cause circumstances of
compartmental vitamin BI2 deficiency
.
-
It appears the
Aquo-Cobalamin
[H20-
Cbl
] may bind NO and quench its effects both in vitro and in vivo.
-
The vitamin BI2 deficiency-like state noted with prolonged N20 administration is associated with an inactivation of
Methionine
Synthase
. N20 causes
dissociation of enzyme-bound
Methylcobalamin
with consequent diminution of enzyme activity as
Nitrosylcobalamin
is a poorer cofactor for
Methionine
Synthase
than the native, unmodified H20-
Cbl
.
-
Greenberg et al have shown that H20-
Cbl
might also quench NO effects in vivo. H2O-Cbl administered to mice could prevent or reverse
endotoxin-induced
shock
. Mice receiving H20-
Cbl
and
endotoxin
had lower serum NO levels (nitrite/nitrate) and higher urinary NO, and their
endotoxin-induced
mortality was reduced. They believed that
Nitrosylcobalamin
was formed in vivo in the mice overproducing NO as a result of
endotoxin
injection, and that the
Nitrosylcobalamin
was being eliminated in the urine.
-
It is possible that overproduction of NO in neural tissues as result of
HIV-l infection
could cause localized cobalamin functional deficiency, with resultant neuropathology consequences. These in vitro studies suggest that interactions between NO and
cobalamins
may have important consequences in vivo.
-
Anti-leukemia activity
of human macrophages involves the generation of Nitric Oxide (NO) derivatives. The NO induces a decrease in intracellular ferric iron levels, increasing
Apoptosis
of the leukemic cells.
-
Addition of exogenous
Iron
reversed
this NO-mediated inhibition of cell growth by elevation of intracellular iron, protecting leukemia cells from NO-mediated
apoptosis
.
-
H2O-Cbl
blocks
the NO-mediated inhibition of HL-60 leukemia cell proliferation.
-
Methylcobalamin
was noted by
Akaike
et al to block
NO-mediated toxicity for neural cells
in vitro. It is likely that the
Me-Cbl
had been converted by light to H2O-Cbl.
-
H20-
Cbl
has been noted to inhibit the abilities of NO to cause smooth muscle relaxation in vitro.
-
Note that Nitrous Oxide is used in some dental procedures, and formerly was use for "twilight sleep" in labor.
-
Lab Evaluation:
-
Normal Serum B12 >400pg/ml
-
False normal B12 levels with Active Liver Disease, Lymphoma,
Alcoholism, Intestinal bacterial overgrowth
-
Serum or Urinary
MethylMalonicAcid
(
MMA
) often increased in deficiency
-
TransCobalaminII
(TC-II) decreased in deficiency
-
B12 Treatment
-
IM
or SQ injection 100 to 1,000 mcg every 1 to 3 months
-
Oral dosing 500 to 2,000 mc g/d
-
Sublingual forms 2,000 mcg/d
-
Intranasal administration 500 mcg weekly
-
Folate
(Vitamin B9)
[67,68]
-
Sources of
Folate
-
Food
Folate
(transforms to 5-
methylTHF
):
-
In contrast to
Synthetic FA (Folic Acid)
, which is a
monoglutamate
,
Natural
Food
Folates
are predominantly
polyglutamates
with a variable
number of glutamate residues. It is estimated that approximately two-thirds of total
Folate
intake from a mixed unfortified diet is in the
polyglutamyl
form, derived mainly
from vegetables. These
polyglutamates
need to be
hydrolysed
to the
monoglutamate
form for normal absorption in the proximal small intestine. [24
-
This process is controlled by the intestinal brush-border enzyme glutamate
carboxypeptidase
II (
GCPII
).
GCPII
has a pH optimum at 6–7 and ingestion of
foods that can change the intestinal pH may result in incomplete intestinal
deconjugation
of
polyglutamyl
Folates
. For example,
Tamura
et al. (1976) have found a marked
reduction in the
bioavailability
of
heptaglutamate
when added to 600 ml diluted
orange juice in comparison with FA. The authors have established that the reduction in
heptaglutamate
bioavailability
is as a result of the
loweringof
pH (to 3.7) by the
high load of orange juice. Organic acid ions (citrate,
malate
,
ascorbate
and
phytate
)
present in orange juice have a combined inhibitory effect on the activity of
GCPII
.
Food
Folates
also have poor stability during cooking. [24]
-
Food
Folate
is then rapidly converted and carried in the blood as
5-
methylTHF
(
N5CH3THFGlu1)
, which readily enters cells and
crosses the
blood-brain barrier
by active transport
.
-
5-
methylTHF
must be
demethylated
in the brain to
THF
by the B12-SAM
pathway, then
polyglutamated
(GLU5 vs GLU1)
or it will exit the cell back
into the
CSF
or bloodstream.
-
Non-Food
Folate
(Folic and
Folinic
Acid):
-
Folic Acid can
correct DNA synthesis in blood cells
.
-
Non-food Folic Acid
also enters blood cells, but
bypasses the
B12-SAM pathway
, converting to
THF
(via DHFGlu1).
-
Folic acid (FA), unlike N5CH3THFGlu1(from Food
Folate
), can
directly enter B12-deficient blood cells and
resolve anemia
-
Given in large doses on a continuous basis FA can maintain intracellular
DNA synthesis
, even when B12 is deficient.
-
Folic Acid does
not correct B12 neuropathy
caused by impaired
methylation
,
since
FA does not enter nerve cells
.
-
Folic Acid does not cross the blood-brain barrier
-
The potential danger is that with Folic Acid supplementation in dietary staples
such as flour, the incidence of B12 deficiency could rise, since the Folic acid
corrected anemia masks the neurological deficit
.
-
In dividing cells (bone marrow),
Folate
becomes trapped as 5methylTHFGlu5
("Methyl
Folate
Trap") and
SAH
inhibits
methylation
.
-
Brain cells would be
afffected
by this
only if cells are dividing
. ???
-
Folinic
Acid
can produce methyl groups for DNA and RNA synthesis
despite a B12 deficiency (see below).
-
B12 Metabolic Pathways
[55-72a]
-
MethylB12
/
Folate
:
First Pathways
-
One carbon (methyl) transfer (1)
:
-
Methylation
Reactions
[62]
-
SAM/
Methionine
Synthesis
-
THF
Synthesis
-
Thymidine
/DNA Synthesis
-
SAM CYCLE
-
Homocysteine
is converted to
Methionine
[62]
-
requires
Methylcobalamin
B12
,
Methionine
synthase
and
Pyridoxine
-
requires
THF
cycle
to regenerate
5-
methylTHF
-
Occurs in the
Cytoplasm
-
Methionine
is converted to
S-Adenyl-Methionine
(SAM)
-
SAM
is primary for
methylation
of DNA, RNA, Protein, Lipid,
and as a
precursor to
Polyamine Synthesis
.
[22]
-
Transmethylation
,
Transsulfuration
:
-
Homocysteine
is
methylated
to
Methionine
then to
S-Adenosyl-Methionine
(SAM)
-
A methyl group is removed from
SAM
, is given up to produce
SAH
(
S-AdenosylHomocysteine
), to
Homocysteine
, which is
remethylated
to
Methionine
via
Methionine
Synthase
(using methyl from
Folate
or
Folinic
acid).
-
Homocysteine
can also be metabolized to energy
In Peripheral Cells,
but not in the Brain
, thru
Cystathionine
and
Cysteine
(
transulphuration
)
.
The
brain is thus totally dependent on the SAM pathway to
metabolize
Homocysteine
.
-
Neurotransmitter
methylation
:
-
Involves
carboxy-O-methyltransferase
(
COMT
)
-
Depression/prefrontal function (norepinephrine, dopamine regulation)
-
Extraneuronal
epinepherine
and norepinephrine degradation
to
metanephrine
and
normetanephrine
-
COMT
inhibited by high
SAH
/ or B12 deficiency
-
Tumor Necrosis Factor (
TNF
)-programmed cell death induced
by high
SAH
/B12 deficiency
-
Phospholipid
methylation
:
-
Influences
membrane properties
-
Protein Synthesis:
-
SAM
/
THF
CROSSOVER -
Methionine
Synthase
Note that the
SAM
and
THF
cycles are
linked
at the
Methionine
Synthase
Crossover,
passing the methyl group
from 5-
methyl
THF
to
Methionine
:
SAM PATH/
THF
PATH
Crossover
-
Homocysteine
>
Methionine-CH3
(SAM cycle)
5-CH3-
TetraHydroFolate
>
TetraHydroFolate
(
THF
cycle)
-
Methyl-B12 Deficiency:
-
mB12 Deficiency:
Homocysteine
and
5-
methylTHF
can
Accumulate
First B12 SAM PATHWAY
(mB12
dependent
)
-
Methyl-B12 deficiency
allows
Homocysteine
(SAM)
and
5-
THF
(
THF
)
to
accumulate
-
In the brain,
Homocysteine
is reverted to
SAH
as it accumulates, with a fall in
the SAM/
SAH
ratio.
-
SAH
inhibits
methylation
reactions.
-
SAH
methylation
inhibition
varies
from organ to organ.
-
Homocysteine
is
vasculotoxic
and
neurotoxic
, which may contribute
to neurological damage.
-
Homocysteine
also
inhibits
N-methyl-D-Aspartate
receptors
.
[67]
-
mB12 deficiency:
Homocysteine
Level can be
Normal
First B12 Accessory Pathway 1
:
BETAINE
PATH
(B12 independent)
[22]
-
There is an
another way that
Homocysteine
re-methylates
directly
back to
Methionine
,
the
Betaine
Pathway
(B12 First Path diagram).
-
This path is
independent of B12
,
but
requires
THF
. It may be important for
Cholinergic
function in the Fetus and in the Aged. It appears to be present in
Liver, Kidney, Brain and Red Cells (see orange triangle in the First Cycles Diagram).
-
mB12 Deficiency:
Homocysteine
Level can be
Normal (periphery only)
First B12 Accessory Pathway 2
:
CYSTEINE
PATH
(mB12
independent
)
[22]
Homocysteine
can also be metabolized to
Propionyl-CoA
in Peripheral Cells,
bypassing
Methinonine
Synthase
(thru
Cystathionine
). This
reducies
Homocysteine
Levels
, providing a source of Energy.
(
Propionyl-CoA
in turns feeds into Fatty Acid metabolism, which requires
aB12
, but not
mB12
(see
B12 Second Path
).
-
THF
CYCLE
(
TetraHydroFolate
)
-
THF
to
5,10-
methyleneTHF
to
5-
methylTHF
:
-
Requires SAM cycle
to
regenerate
Terahydrofolate
(
THF
)
from
Folate
or
Folinic
Acid
to make
Thymidine
for DNA
-
Occurs in the
Cytoplasm
-
Important in RNA synthesis:
-
A detailed view of the
THF
Cycle
[65]
-
DNA (
THYMIDINE
) CYCLE
-
Thymidine
Synthesis/
Methylation
(Cell Growth)
-
does not require SAM cycle
to regenerate
Terahydrofolate
(
THF
)
if
Folinic
Acid or Active
Formate
are available.
-
Occurs in the
Nucleus
.
-
AdenylB12:
Second Pathway
-
Fatty Acid Metabolism (2)
:
[62]
Methylmalonyl-CoA
to
Succinyl-CoA
-
Beta Oxidation of
odd
-chain fatty acids
,
Homocysteine
,
Methionine
-
requires
Adenylcobalamin
B12
(aB12)
and
Methylmalonyl-CoA
mutase
-
occurs in the
Mitochondria
-
Odd-chain Fatty Acids -->
Propionyl-CoA
-->
Methylmalonyl-CoA
-->
Succinyl-CoA
-->
Succinate
-
Get an excess of odd chain fatty acids
-
produces
GTP
-
Normal Fatty Acid Oxidation
Beta Oxidation of
even
-chain fatty acids does not require B12
[58]
Even-chain
Fatty Acids
convert
to
Acetyl-CoA
thru
Beta Oxidation
Even-chain Fatty Acids
are
metabolised
to CO2 and water
Even-chain Fatty Acids
cannot convert to Glucose
[55]
-
Adenyl-B12 (aB12) Fatty Acid Metabolism Detail
:
Odd-chain FA, Branched Amino Acids, VitaminB1 and Cholesterol are
metabolized
to
Succinyl-CoA
. [22]
-
Requires
Adenyl-Cobalamin
(aB12
)
-
Propionyl-CoA
converts to
L-Methylmalonyl-CoA
or
MethylMalonicAcid
(
MMA
)
-
L-Methylmalonyl-CoA
converts further to
Succinyl-CoA
to enter to Citric Acid Cycle
-
Adenyl-B12 Deficiency:
Overproduction of
MMA
-
Accumulation
of
Propionyl-CoA
,
Methylmalonyl-CoA
,
MMA
-
In
Cbl
deficiency, the conversion to
Succinyl-Coa
is impaired, leading to a
build up
of the intermediates
Propionyl-CoA
, D&
L-Methylmalonyl-CoA
, and thus
increased
MMA
and
Methylcitric
Acid.
-
Methylmalonyl-CoA
inhibits Fatty Acid Synthesis
(even & odd chain) [58a]
-
MMA
is rapidly converted to
unkown
compounds [22]
-
There is an unimpressive correlation between
MMA
levels in
the blood and/or urine and the severity of neurological disease.
The accumulation of large amounts of
MMA
does not lead to central neuropathy in
some patients
[72]
-
Accumulation
of
unusual odd-chain fatty acids
in Nerve cell membranes
may cause
irreversable
neurologic
disorders
[22]
-
Propionyl-CoA
/
Methylmalonyl-CoA
(which accumulates) add 3-carbon units
to produce Odd&Branched-chain Fatty Acids (instead of 2-carbon units added during
normal Fatty Acid Synthesis which produce Even-chain Fatty Acids).This may lead to
Demylenation
, but
Neuro-Psychatric
symptoms are not seen in situations with
increased levels.
-
Demylenation
, Axonal Degeneration
are seen both peripherally and centrally.
-
Fronto
and
Fronto-Parietal
Cranial
Atropy
in a 14 month old boy with
severe dietary B12 Deficiency caused by his mother's
vegan
diet
[61]
-
B12 and
uMMA
excretion became normal 10 days after treatment began
-
EEG
was normal after 6 weeks
-
Cranial
MRI
was normal after 10 weeks of treatment
-
Cognitive and Language development was still impaired at 2 years of age,
however.
-
Window for reversal
appears to be
short
(?months)
-
There are no in vivo studies
of biochemical and functional alterations of
neuronal cells from B12 deficiency.
[55]
-
FDA decision to fortify cereals with Folic Acid
may mask or accelerate
neurologic
features in untreated B12 deficiency
, since the
neurological features are not corrected by
Folate
(
Folate
does not
cross the blood-brain barrier).
-
Folinic
Acid (5-
formyltetrahydrofolate
(5-
FTHF
) at 1-3mg/kg/day normalizes
CSF
5-
methyltetrahydrofolate
(5MTHF). [65a]
-
Elderly subjects with depression, lethargy, and memory impairment
taking 50mg/week 7mg/day) improved
visuomotor
performance,
visuospatial
memory, logical reasoning, associative memory, and activities
for daily living. [65b]
-
Cell
Locaton
of
SAM
/
THF
,
FATTY ACID
Paths (
mB12 First
and
aB12
Second
Pathways)
[72]
-
Fatty Acid
Synthesis
[59]
-
Marrow and
Mucosal
Cells depend on
SAM
for growth.
-
B12
Third Pathway
-
Other
Neurologic
Processes(3)
B12
has
hormone-like actions
in the
CNS
[21,22,72]
-
It appears that neuropsychiatric abnormalities are caused by decreased
activity of a
thrid
mammalian B12- dependent enzyme
.[22]
-
Neurologic
lesions in Cobalamin deficient rats are the result of an
inappropriate release and/or synthesis of
Neurotoxic
Cytokine
(s)
and
Neurotrophic
Growth Factor(s
), both elicited by permanent B12 deficiency.
-
Cobalamin Deficiency
in
rat
CNS
increases
the production of a
Myelin-damaging agent
Tumor Necrosis Factor
(
TNF-a
)
and decreases that of a
Neurotrophic
Agent
Endothelial Growth Factor
(
EGF
)
.
-
It follows that
B12
plays a regulatory role in the normal
mammalian
CNS
regardless of its
coenzyme functions
, since
the severe
neuro-damage
caused by Cobalamin deficiency
in the rat occurs as a result of a shift in the physiological equilibrium
towards
Neurotoxic
Agents
.
-
The level of the biologically active form of
TNF-a
is
higher
in the Spinal Cord of
TGX
rats, which manifest
Intramyelinic
and Interstitial Edema.
-
Permanent Cobalamin deficiency causes an
absence of 4a
EGF
-
mRNA
in the Neurons and
Glia
of various
CNS
areas
,
however the deficiency is induced.
-
The chronic administration of
B12 restores
EGF-CSF
levels
and
EGF
mRNA
expression in
TGX
rats in various
CNS
areas
which have been studied.
-
The
Betaine
First Accessory Path does not appear to play a role in
neuropsychiatric abnormalities caused by B12 deficiency. [22]
-
A
Chicken-Vegan
diet, without B12, would not prevent these
abnormalites
.
-
The FLING Diet ®
Take a look at the Nutrition Guidelines of the The FLING Diet ® which draws on
these basic principles!
-
References
-
B12
1)B12 Dietary Absorption -
WIPO
http://www.wipo.int/
pctdb
/en/
wo.jsp
?IA=WO2002%2F067995&
WO
=2002%2F067995&DISPLAY=
DESC
2)Nitric oxide interactions with
cobalamins
: - M
Brouwer
1996
http://bloodjournal.hematologylibrary.org/
cgi
/content/abstract
http://bloodjournal.hematologylibrary.org/
cgi
/reprint/88/5/1857.
pdf
2a)Nitric Oxide induces
Apoptosis
in Leukemia cells - H Ferry-Dumazet1 2002
http://www.nature.com/leu/journal/v16/n4/full/2402404a.html
2b)Subacute combined degeneration of the spinal cord after nitrous oxide anaesthesia -
Beltramello
http://jnnp.bmj.com/
cgi
/content/full/64/4/563
2c)MR findings in subacute combined degeneration of the spinal cord caused by
nitrous oxide anaesthesia - I
lniczky
http://www.neuroanatomy.wisc.edu/
selflearn
/
SCD.htm
2d)
MRI
of the Cervical Spine: Unusual Non-Neoplastic Disease -
Basak
www.medscape.com/
viewarticle
/464850
3)Analogues, Ageing and Aberrant Assimilation of B12 in Alzheimer's Disease -
McCaddon
http://content.karger.com/
ProdukteDB
/
produkte.asp
?
Aktion
=
ShowFulltext
&
ArtikelNr
=
000051247&
Ausgabe
=227767&
ProduktNr
=224226
4)Vitamin B12
Pathophysiology
- Smith
http://www.lifesave.org/VitaminB12Pathophysiology194-196.
htm
5)Testing for Bio-Active Vitamins - Food Product
Marsili
http://www.foodproductdesign.com/articles/462/462_0296QA.html
6)Fatty Acid Oxidation - Biochemistry Berg
http://www.ncbi.nlm.nih.gov/books/
bv.fcgi
?rid=
stryer.section
.3061#3065
7)B12 Sources -
Wantanabe
2007
http://www.ebmonline.org/
cgi
/content/full/232/10/1266
8)
Corrinoid
(B12) Nomenclature -
IUPAC-IUB
http://www.chem.qmul.ac.uk/
iupac
/misc/B12.html
9)B12, B9 and Depression
http://www.psycom.net/
depression.central.folate
_B12.html
10)Biosynthesis of B12 in Bacteria
http://www.blackwell-synergy.com/
doi
/
pdf
/10.1111/j.1432-1033.1993.tb18344.x
11)B12 Absorption Spectra
http://omlc.ogi.edu/spectra/
PhotochemCAD
/html/vitaminB12.html
12)B12
Transdermal
B12 Patch
http://www.b12patch.com/?
gclid
=CPStxvrAnpICFQGCxwod-hT5-w
14)Microwave Menace -
Soloman
http://www.susansolomonmd.com/microwave_
menace.html
15)
Xray
Structures of B12 Derivatives -
Kratky
http://www.uni-graz.at/che3www/
strubi
/papers/full_text/
ruma
/
paper.htm
16)Functional Adaptation of
Ileal
B12 Absorption in Man - A. M.
Mackinnon
http://www.springerlink.com/content/w17u24l174540157/
17)B12 is a complicated Vitamin
http://www.newscientist.com/article/mg13918904.300-the-assault-on-b12-the-gargantuan-task-of-
unravellingnatures-route-to-vitamin-b12-is-almost-complete-
18)B12 Optic Neuropathy
http://grande.nal.usda.gov/
ibids
/
index.php
?mode2=detail&origin=
ibids
_references&
therow
=9345
21)B12 Neurological Diseases - Singh Thomas E-Medicine
http://www.emedicine.com/
neuro
/topic439.
htm
22)Metabolic Abnormalities in cobalamin (vitamin b12) and
folate
deficiency 1993 - RH Allen
www.fasebj.org/
cgi
/content/abstract/7/14/1344
23)50 Ways to Develop B12 Deficiency -
Vegan
Forum
www.veganforum.com/forums/
showthread.php
?t=196
24)
Folate
Bioavailability
-
McNulty
http://journals.cambridge.org/production/action/
cjoGetFulltext
?
fulltextid
=902072
-
FATTY ACIDS
25)
Fatty Acids
http://en.wikipedia.org/
wiki
/Fatty_acid
26)
Trans Fatty Acids
http://en.wikipedia.org/
wiki
/Trans_fat
27)
Saturated and Total Fat Contents Oils
www.scientificpsychic.com/fitness/
fattyacids.html
28)
Hydrogenation/
Linoleic
Acid
http://www.chm.bris.ac.uk/
motm
/
linoleic
/
linh.htm
29
)Future of Milk Fat Modification - O’DONNELL
jds.fass.org/
cgi
/content/abstract/76/6/1797
29a- Trans Fatty Acids and Coronary Heart Disease: Background and Scientific Review
Alberto
Ascherio
et al, Departments of Nutrition and
Epidemiology
,
Harvard School of Public Health
ascherio1999.html (archive)
29b- Cell Membrane Trans-Fatty Acids and the Risk of Primary Cardiac Arrest -
Lemaitre
http://www.circ.ahajournals.org/
cgi
/content/abstract/105/6/697
29c- Trans Fats: The Story behind the Label
http://www.hsph.harvard.edu/review/
rvw
_spring06/rvwspr06_
transfats.html
29d- Trans
fattyacids
: are the effects only marginal? - W C
Willett
and A
Ascherio
http://www.ajph.org/
cgi
/content/abstract/84/5/722
29e- Trans Fatty Acids - Hydrogenated & Partially Hydrogenated Oils:
http://www.recoverymedicine.com/hydrogenated_
oils.htm
29f-Trans Fatty Acids - Information Food Science and Technology Trust Fund
www.ifst.org/
uploadedfiles
/
cms
/store/ATTACHMENTS/
tfas.pdf
29g-Influence of Trans Fatty Acids on Health -
Stendera
http://content.karger.com/
ProdukteDB
/
produkte.asp
?
Aktion
=
ShowFulltext
&
ProduktNr
=
223977&
Ausgabe
=229852&
ArtikelNr
=75591
29h-Effects of Partially Hydrogenated Oil and Butterfat on Serum Lipoprotein-
Almendingen
http://www.jlr.org/
cgi
/content/abstract/36/6/1370
29i- Role of
TFAs
(trans fatty acids & other degenerated fatty acids) in Disease
http://www.treelight.com/health/nutrition/
TFAsAndFasting.html
29j-
Saturated, Dietary Fats and
Progression of Atherosclerosis -
Mozaffarian
,
Knopff
http://www.ajcn.org/
cgi
/content/full/80/5/1102
http://www.ajcn.org/
cgi
/content/full/80/5/1175
http://findarticles.com/p/articles/mi_m0CYD/is_13_39/ai_n6114090
29k)
Dietary Fat and Cancer - American Institute for Cancer Research
Advances in Experimental Medicine and Biology Vol422
http://books.google.com/books?id=PGGVzML7nUMC&pg=PA59&
lpg
=PA59&
dq
=Long+Chain+Saturated+
Fatty+Acids+(
LCSFA
)+inhibit+Breast+Cancer+Cell&source=
bl
&
ots
=jH0RHoHhfb&
sig
=QBIYSzEj2PzYW-AcXszYTuTzhL8&hl=en&
sa
=X&
oi
=book_result&
resnum
=1&ct=result
30
)
Stearic
Acid Model
http://www.3dchem.com/
moremolecules.asp
?ID=388&
othername
=
Stearic
%20acid
31) Fatty Acid Metabolism
www.jbc.org/
cgi
/reprint/134/1/397.
pdf
32) Trans Fat Labeling
http://www.cfsan.fda.gov/~
dms
/qatrans2.html
32b) Trans Fat History and Labeling
http://www.hsph.harvard.edu/
nutritionsource
/nutrition-news/
transfats
/
33) Trans Fat Biochemistry
http://people.umass.edu/
ktheis
/
tfa.htm
34) Trans Fatty Acids
Ellin
Doyle
http://jchemed.chem.wisc.edu/Journal/Issues/1997/Sep/abs1030.html
35) Trans Fat Fact Sheet
http://www.nebeef.org/post/
lfu
/
Trasn
_Fatty_Acid_Fact_
Sheet.pdf
36 )
HDL
/
LDL
ratio Fish Oil
http://jlr.org/
cgi
/content/abstract/36/6/1370
37) Omega-3 Fatty Acids
http://en.wikipedia.org/
wiki
/Omega-3_fatty_acid
Omega-3/6 Fatty Acid Ratio
38)
DHA
/EPA Institute (Interesting**)
http://dhaomega3.org/
index.php
?category=overview&title=Omega-6-to-Omega-3-Ratio
Essential fatty acids in health and chronic disease.
http://www.pponline.co.uk/
encyc
/omega-3-omega-6.html
http://
lib.bioinfo.pl
/
meid
:38610
-
A P
Simopoulos
38a) Metabolic Fate of LA, ALA, and
LC-PUFAs
http://www.fatsoflife.com/
pufa
/intro_7.asp
38b)
DHA
/
TFA
Infants
http://dhaomega3.org/
index.php
?category=overview&title=Omega-3-and-Trans-Fatty-Acids
http://dhaomega3.org/
index.php
?category=overview
38c)Butter & Milk Fats
What is Butter/Milk (Saturated,
DHA
/EPA)
http://webexhibits.org/butter/
compounds-fatty.html
http://www.livestocktrail.uiuc.edu/
dairynet
/
paperDisplay.cfm
?
ContentID
=286
2H
NMR
studies of isomeric omega 3 and omega 6 polyunsaturated
phospholipid
membranes
MA McCabe et al, Biochemistry. 1994 Jun 14;33 (23):7203-10 (
NMR
Studies)
http://www.unboundmedicine.com/
medline
/
ebm
/record/8003485/abstract/2H_
NMR
_studies_of_isomeric_omega_3_and_omega_6_polyunsaturated_
phospholipid
_membranes
_
Essential fatty acids in health and chronic disease.
AP
Simopoulos
et al, Am J
Clin
Nutr
. 1999 Sep ;70 (3
Suppl
):560S-569S (
EFA
in Health)
http://www.ncbi.nlm.nih.gov/
pubmed
/10479232
38d) Hemp
http://www.intensivenutrition.com/
hempoil.htm
http://books.google.com/books?id=14ENix5RzMg&hemp
www.drbronner.com/
pdf
/
hempnutrition.pdf
39)
LDL
/
HDL
Ratios
http://www.healthy-heart-guide.com/
cholesterol-ratio.html
trans chol.pdf (archive)
Membrane Structure
40a
http://www.cytochemistry.net/Cell-biology/membrane_
intro.htm
40b
http://en.wikipedia.org/
wiki
/Cell_membrane
41) Pocket Atlas of Nutritio
n -
Biesalski
(good pictures, interesting)
http://books.google.com/books?id=dKr4rwmptZwC&
printsec
=
frontcover
&
dq
=pocket+atlas+of+nutrition+
biesalski
&
sig
=
ACfU3U1UX50blGCbcEeAL4d6wc6NUIKlYQ#PPA111,M1
41a) Omega-6 Fatty Acid
http://en.wikipedia.org/
wiki
/Omega-6_fatty_acid
41b) Grass Feeding Benefits
http://www.eatwild.com/
healthbenefits.htm
http://www.americangrassfedbeef.com/
grass-fed-natural-beef.asp
http://www.csuchico.edu/
agr
/
grassfedbeef
/health-benefits/
index.html
http://www.theatlantic.com/doc/200710u/beef-flashback
http://jwest.biz/
blog
/archives/2007_04_01_archive2.html
grassfedbeach ross (archive)
-
SUGAR
42)Sugar Metabolism
http://www.medbio.info/Horn/Time%201-2/carbohydrate_
metabolism.htm
43)GLUT Transport Proteins and Monosaccharide absorption
http://www.medbio.info/Horn/Time%203-4/glucose_transport_
proteins.htm
http://www.vivo.colostate.edu/
hbooks
/
pathphys
/digestion/
smallgut
/absorb_
sugars.html
44)Fructose and Obesity
http://www.ajcn.org/
cgi
/content/full/76/5/911
44a) Treatment of Obesity with
Calorically
Unrestricted Diets - A. W.
Pennington
Am. J. Clinical Nutrition,
Jul
1953; 1: 343 - 348
http://www.ajcn.org
45)Resistant Starch
http://www.nutritionandmetabolism.com/content/1/1/8
46)Sugar and Exercise
http://grande.nal.usda.gov/
ibids
/
index.php
?mode2=detail&origin=
ibids
_references&
therow
=278373
47)
Glycolysis
http://en.wikipedia.org/
wiki
/
Glycolysis
http://en.wikipedia.org/
wiki
/Fructose_2,6-
bisphosphate
48)
Hexokinase
http://www.pubmedcentral.nih.gov/
articlerender.fcgi
?
artid
=1265209
C. J.
Toews
, Kinetic studies with skeletal-muscle
hexokinase
Department of Biochemistry, Queen's University, Kingston, Ontario, Canada
Biochem
J. 1966 September; 100(3): 739–744.
48a) GLUT Transport Proteins
www.medbio.info/Horn/
PDF
%20files/glucose%20transport%20proteins.pdf
-
VITAMIN B12
49)
wantanabe
microwave B12 Jan 1998
www.ncbi.nlm.nih.gov/
pubmed
/10554220
50)
wanatabe
microwave hydroxy-B12 Nov 1998
http://pubs.acs.org/
doi
/abs/10.1021/jf980727v
51)Vitamin B6 deficiency
http://www.naturalnews.com/02356.html
Understanding Nutrition - Eleanor
Noss
Whitney, Sharon
Rady
Rolfes
52)Vitamins in Food Microwaving Processing - Ball
http://books.google.com/books?id=mcwdkygB0FQC&pg=PA280&
lpg
=PA280&
dq
=microwave+b12&source=
web&
ots
=3lxzlP3f2o&
sig
=PkRkd6ZwAvYLDN9bSjVJpDfwKek&hl=en&
sa
=X&
oi
=book_result&
resnum
=1&ct=result
52a)Microwave Heating of Fats
http://www.actahort.org/books/474/474_139.
htm
53)Low Levels of Serum B12 may be related to
Helicobacter
Pylori Infection David Ball
Journal of Clinical
Gastroenterology
http://www.docguide.com/news/
content.nsf
/news/8525697700573E1885256CBA0024A344
53a) Gastritis
www.sh.lsuhsc.edu/
fammed
/
OutpatientManual
/
AdultGIProb.htm
53b)Vitamin B12 deficiency and gastric
histopathology
in older patients -
Dholakia
KR
www.wjgnet.com/1007-9327/11/7078.
pdf
54) The effects of increased folic acid intake among the elderly has benefits or harm
depending on vitamin B12 level - Morris
http://www.nutraingredients.com/Research/Folic-acid-effects-two-faced-depending-on-B12-levels-says-study
55)
Folate
, vitamin B12, and neuropsychiatric disorders -
Bottiglier
T
Nutr
Review 1996 Dec; 54(12):382-90
http://www.lef.org/protocols/abstracts/
abstr
-077.html
http://www.ncbi.nlm.nih.gov/
pubmed
/9155210
56)
Sandyk
R,
Awerbuch
GI
Vitamin B12 and its relationship to age of onset of multiple sclerosis.
Int
J
Neurosci
. 1993
Jul
; 71(1-4):93-9
http://www.lef.org/protocols/abstracts/
abstr
-077.html
57)
Approaches to vitamin B1 2 deficiency (good overview**)
Early treatment may prevent devastating complications - T. S.
Dharmarajan
, MD;
http://www.postgradmed.com/
index.php
?art=
pgm
_07_2001?article=977
58) Even-chain FA cannot produce glucose
Fatty acid metabolism - Silva
http://www2.
ufp.pt
/~
pedros
/
bg
/
fatty.htm
58a)
Handbook of Vitamins, p492 - Robert B.
Rucker
http://books.google.com/books
59) The Effect of Vitamin B12 deprivation on the Enzymes of Fatty Acid Synthesis -
Frenkel
E, et al
J of Bio Chem, 248(21):10Nov1973,p7540-46
http://www.jbc.org/
cgi
/content/abstract/248/21/7540
60) B12
Cyanocobalamin(PI)
www.apppharma.com/
PIs
/59-PI_Cyanocobalamin_45813C.pdf
61) Von
Schenck
1997
Persistence of neurological damage induced by B12 deficiency in infancy
http://www.lef.org/protocols/abstracts/
abstr
-077.html
62) Vitamin B12 and
Folate
Metabolism
www.dentistry.leeds.ac.uk/
biochem
/lecture/
nutritio
/Vitamin%20B12,%20folate,%20D%20%20powerpoint.ppt
63)
Vitamin B12 deficiency: Recognizing subtle symptoms in older adults (
excellent
**)
March 2003 Volume 58, Number 3 Geriatrics
TS
Dharmarajan
, MD • GU
Adiga
, MD • Edward P.
Norkus
, PhD
http://geriatrics.modernmedicine.com/geriatrics/Refereed+Clinical+Articles/Vitamin-B12-deficiency-
Recognizing-subtle-symptoms/
ArticleStandard
/Article/detail/50225
64)
Metabolism - An Overview
(
excellent
overview of Metabolism*)
http://web.virginia.edu/Heidi/chapter18/chp18.
htm
Cobalamin Isomers
http://web.virginia.edu/Heidi/chapter18/Images/8883n18_28.
jpg
65) Chapter 9 Water Soluble Vitamins
http://faculty.fortlewis.edu/
byrd
_s/Nutrition/lecture%20ppts/WatersolubleCh9.
ppt
65a)
Psychomotor retardation with low 5-
methyltetrahydrofolate
in cerebrospinal fluid responding to
folinic
acid
http://www.ncbi.nlm.nih.gov/
pubmed
/12571785
65b) Folic acid, ageing, depression, and dementia - E H Reynolds
http://www.bmj.com/
cgi
/content/full/324/7352/1512
-
OVERVIEW VITAMIN B12
66) Dyspepsia/Heartburn/Gastric Emptying
Journal of Clinical
Gastroenterology
(2003;37:230-3)
http://naturalfoodsmerchandiser.com/
ArticlePage
/
tabid
/66/
itemid
/1076/
pageid
/5/
Default.aspx
67) Donald G Weir and John M Scott
Brain function in the elderly: role of vitamin B12 and
folate
British Medical Bulletin 1999; 55 (No. 3): 669-82
http://bmb.oxfordjournals.org/
cgi
/content/abstract/55/3/669
68) Folic Acid
http://en.wikipedia.org/
wiki
/Folic_acid
69)
Folate
, B12 & Depression - Goldberg (
Medline
Search)
http://www.psycom.net/
depression.central.folate
_B12.html
70) Subtle Vitamin-B12 Deficiency and Psychiatry: A Largely
Unnoticed but Devastating Relationship?
Med Hypothesis 1991,
Dommisse
J
http://cat.inist.fr/?
aModele
=
afficheN
&
cpsidt
=11494835
http://www.johndommissemd.com/site/965699/page/368501
http://www.psycom.net/
depression.central.folate
_B12.html
71) The biochemical basis of the neuropathy in cobalamin deficiency.
Weir DG, Scott
JM
.
Baillière’s
Clin
Haematol
1995; 6: 479–97
http://www.ncbi.nlm.nih.gov/
pubmed
/8534958
http://www.sciencedirect.com/science
72) Subacute Combined Degeneration One Century Later.
The
Neurotrophic
Action of Cobalamin (Vitamin B12) Revisited -
Scalabrino
, G 2001
http://www.jneuropath.com
72a)
Homocysteine
as a risk for vascular disease
Nutrition Research Reviews
(1998), 11, 31 1-338 - Weir
www.journals.cambridge.org/production/action/
cjoGetFulltext
?
fulltextid
=593608
-
CLA
BENEFITS
73)Conjugated
Linoleic
Acid (
CLA
)
Wikipedia
http://en.wikipedia.org/
wiki
/Conjugated_
linoleic
_acid
74)Fat Loss -
CLA
reduces fat and preserves muscle
Journal of Nutrition -
Pariza
http://thyroid.about.com/
cs
/
dietweightloss
/a/
cla.htm
http://www.sciencedirect.com
74a)Grass-fed beef
http://www.alderspring.com/health_benefits/html/
cla.html
74b)
CLA
Health Benefits - U of Glasgow
www.gla.ac.uk/media/media_79683_
en.pdf
74c)
CLA
is anti-estrogenic -
Liu
http://www.ingentaconnect.com/content/
klu
/
brea
/2005/00000094/00000002/00006942
74d)Conjugated
linoleic
acid induces
apoptosis
through estrogen receptor alpha in human breast tissue -
Liu
http://www.biomedcentral.com/1471-2407/8/208
-
EFA
/PG
75)Essential Fatty Acids
http://www.dcnutrition.com/
fattyacids
/
76)AA
pathyway
http://www.arthritis.co.za/
arachid.html
77)Prostaglandin Intro
http://en.wikipedia.org/
wiki
/Prostaglandin
78)PG and Parturition
http://www.jci.org/115/4/986?content_type=abstract
79)
CLA
reduces PGF2a
http://jds.fass.org/
cgi
/content/full/89/10/3826
80)Healthy Fats
http://goodfats.pamrotella.com/
81)
LIver
Damage by TXA2/
PUFA
http://www3.interscience.wiley.com/journal/106599417/abstract
82)Role of Omega-3 Fatty Acids in Cardiovascular Disease Prevention
Physicians Health Study/ Cardiac Death
William S. Harris PhD
http://www.lipidsonline.org/slides/slide01.
cfm
?
tk
=42&
dpg
=1
83)Physician Health Study - Omega-3-Fatty Acids -
Medicine.net
http://www.medicinenet.com/script/main/
art.asp
?
articlekey
=23820&page=3
Physician Health Study (website)
http://phs.bwh.harvard.edu/
83a)
EFA
http://en.wikipedia.org/
wiki
/Essential_fatty_acid#Nomenclature
84)Pulmonary Arteries
TL
Kaduce
, AA
Spector
and
RS
Bar
http://atvb.ahajournals.org/
cgi
/content/abstract/2/5/380
85)Metabolism by Human Colon Bacteria
FAC
Howard and C.
Henderson
Letters in Applied Microbiology 1999,
29
, 193–196
www.blackwell-synergy.com/
doi
/
pdf
/10.1046/j.1365-2672.1999.00616.x
86)
CLA
Gut Bacteria Bio-synthesis
E
Devillard
, F McIntosh, S Duncan, J Wallace
http://jb.asm.org/
cgi
/content/full/189/6/2566
www.ncbi.nlm.nih.gov/
pubmed
/10530040
87)
GLA
/AA induce
Apoptosis
http://www.ncbi.nlm.nih.gov/
pubmed
/9150372
88)
Lipoxin
http://en.wikipedia.org/
wiki
/
Lipoxin
89)
CLA
increases Lipid
Peroxidation
but not Atherosclerosis, Obesity
http://jn.nutrition.org/
cgi
/content/abstract/138/3/509
-
GLA
90a)
GLA
primer
http://en.wikipedia.org/
wiki
/
Gamma-Linolenic
_acid
90)
Beneficial Effects of
GLA
(
gamma-linolenic
acid)
http://pjstory.com/
GLA.htm
91)
Atopic
Dermatitis Linked to Low
É¡
-
Linolenic
Acid
http://www.fatsoflife.com/
article.php
?
nid
=1&edition=this&id=578&
issueid
=65
-
LNA
- FLAXSEED & CANCER
92) Linseed Oil
http://en.wikipedia.org/
wiki
/Linseed_oil
92a)Flaxseed and Prostate
http://www.jonbarron.org/newsletters/02/10-21-2002.
php
92b)ALA
http://en.wikipedia.org/
wiki
/
Alpha-linolenic
_acid
92c)Flaxseed
ER-neg
Breast Cancer - Wang
http://www3.interscience.wiley.com/journal/110478036/abstract?
CRETRY
=1&
SRETRY
=0
92d)
Foods, nutrients and prostate cancer: a case–control study in Uruguay
http://www.nature.com/
bjc
/journal/v80/n3/abs/6690396a.html
92e)
alpha-Linolenic
Acid and Risk of Prostate Cancer - De
Stefani
2000
http://cebp.aacrjournals.org/
cgi
/content/abstract/9/3/335
92f)Flaxseed Halts Prostate Cancer
http://www.medicalnewstoday.com/articles/72990.
php
92g)Flaxseed contains healthy
Lignans
http://www.montanaamber.com/flax_
information.htm
92h)n-3 Fatty Acids and Health- British Nutrition Foundation
http://www.nutrition.org.uk/
home.asp
?
siteid
=43&
sectionid
=626&
subSectionid
=31
-
FATS
93) Butter vs
LNA
Dietary Effects of alpha
linolenic
acid on cholesterol metabolism
in male and female hamsters
http://linkinghub.elsevier.com/retrieve/
pii
/S0955286303001700
94)
LNA
Uterine Effects
http://jn.nutrition.org/
cgi
/content/abstract/122/7/1529
95)Peanut Oil
http://www.herbs2000.com/h_menu/oils_
seeds.htm
96)Unsaturated Fats
http://www.answers.com/topic/unsaturated-fat
http://en.wikipedia.org/
wiki
/Unsaturated_fat
97)Polyunsaturated Fats
http://www.pccnaturalmarkets.com/health/1883000/
98) Canola
http://en.wikipedia.org/
wiki
/Canola
Facts about Canola Oil
canola2WFM.pdf (archive)
wholefoodsmarket.com
-
LA
99) LA info
http://www.chm.bris.ac.uk/
motm
/
linoleic
/
linoleicc.htm
99a) Er-negative breast cancer -
Jakovljevic
http://www.springerlink.com/content/xkfkylk6nqqk1fwp/
99b) Postmenopausal Breast Cancer is associated with High intake of Omega-6
http://www.jstor.org/
pss
/3554025
99d) LA stimulates Breast Cancer - Dietary Fat and Cancer
Advances in Experimental Medicine and Biology Vol422
http://books.google.com/estrogen receptors
99e)Is there a relation between dietary
linoleic
acid and cancer
Am J
Clin
Nutr
68 (1): 5 -
Erickson
www.ajcn.org/
cgi
/reprint/68/1/5
104) LA is Estrogenic -
Liu
http://www.ncbi.nlm.nih.gov/
pubmed
/14974442
http://linkinghub.elsevier.com/retrieve/
pii
/S0944711304702901
105) LA stimulates T47D breast cancer - Reyes
http://linkinghub.elsevier.com/retrieve/
pii
/S0304383503008516
105a)
Linoleic
Acid, but not Oleic Acid,
Upregulates
Production of
Interleukin
-8 by Human Vascular Smooth Muscle Cells
http://rsx.sagepub.com/
cgi
/content/abstract/12/8/593
105b)Analysis of the
cytotoxic
properties of
linoleic
acid metabolites
http://cat.inist.fr/?
aModele
=
afficheN
&
cpsidt
=817919
105c)Differential Effects of
Linoleic
Acid Metabolites on Cardiac -
Harrell
http://jpet.aspetjournals.org/
cgi
/content/abstract/303/1/347
120)
Linoleic
Acid
http://en.wikipedia.org/
wiki
/
Linoleic
_Acid
-
ENHANCED SOYBEAN
100) Enhanced Soybean Oils: Hi-Lo-Normal Level Omega Brochure
http://www.soyconnection.com/soybean_oil/
pdf
/2006oilsbrochure.pdf
100b)
Low-Linolenic
Soybean Oil
http://www.soyconnection.com/soybean_oil/
pdf
/2006oilsbrochure.pdf
100c)Food and Beverage Industry - Soybean Oil
http://findarticles.com/p/articles/mi_m3289/is_11_168/ai_58162133
100d)Soybean Oil
http://www
.
soyconnection.com
100e)
Genetic Enhancement of Soybean Oil -
AgBioForum
http://www.agbioforum.org/v6n12/v6n12a04-
cahoon.htm
100f)
High
stearic
, low
alpha-linolenic
acid soybean oil
substiution
for hydrogenated soybean oil
http://www.ncbi.nlm.nih.gov/
pubmed
/18365266
100g)
Frying performance of
low-linolenic
acid soybean oil
http://cat.inist.fr/?
aModele
=
afficheN
&
cpsidt
=1300900
100h)
Soybean
http://en.wikipedia.org/
wiki
/Soybean
-
COTTONSEED OIL
101) Cottonseed Oil
http://www.organicconsumers.org/
ge
/kellog121505.
cfm
%20
-
CORN OIL
102) LA/
LNA
benefits/ risks -
Vos
http://www.ajcn.org/
cgi
/content/full/77/2/521
103) Spatial Learning CO vs
FO
http://www.sciencedirect.com/science
FO
Spatial Learning
http://toxsci.oxfordjournals.org/
cgi
/content/abstract/57/1/102
Effects of corn oil on spatial learning in rat -
Solhju
www.ingentaconnect.com/content/els/09284680/1998/00000005/90000001/art81140
Differential effects of n-3 fatty acid deficiency on
phospholipid
molecular
species composition in the rat hippocampus
http://www.jlr.org/
cgi
/content/full/43/4/611
Arachidonic
acid improves aged rats' spatial cognition.
http://www.ncbi.nlm.nih.gov/
pubmed
/15811397?
dopt
=Abstract
http://www3.interscience.wiley.com/journal/118608858/abstract
-
CLA
BIOSYNTHESIS
121)Biosynthesis of Conjugated
Linoleic
Acid (
CLA
): A Review -
R.C
.
Khanal
Pakistan Journal of Nutrition 3 (2): 72-81, 2004
www.pjbs.org/
pjnonline
/fin179.
pdf
122)Proceedings of the American Society of Animal Science - Bauman1999
www.asas.org/
jas
/symposia/proceedings/0937.
pdf
124)Milk and
CLA
Synthesis - Bell
www.feedenergy.com/
ConjugatedLinoleicAcid.Bell.Kennelly
.200x.pdf
124a)
CLA
Penn State Primer
www.das.psu.edu/dairy/dairy-nutrition/
pdf-dairy-nutrition
/das0488cla.pdf
124b)
CLA
Info
Clarinol
Supplement
www.pcflabs.com/products/
pdf
/
CLA
_Scientific_Background_
info.pdf
124c)
CLA
Gut Bacteria Bio-synthesis
http://jb.asm.org/
cgi
/content/full/189/6/2566
124d)
CLA
and CO on Beef Adipose
http://jas.fass.org/
cgi
/content/abstract/82/5/1419
124e)
Vaccenic
Acid supplementation for Cows increases
CLA
and decreases Saturated Fats
http://www.pathway-intermediates.com/static/
incept.php
124f)
CLA
- the milk fat wonder -
Bauman
www.dairybusiness.com/northeast/June02/
pdf
/F3%20p21%20CLA%20Milk%20Fat.pdf
124g)Factors Affecting Conjugated
Linoleic
Acid (
CLA
) Content in Milk, Meat, and Egg:
A Review -
Khanal
www.pjbs.org/
pjnonline
/fin182.
pdf
124h)Increasing Amounts of Conjugated
Linoleic
Acid (
CLA
) Progressively Reduces
Milk Fat Synthesis Immediately Postpartum in Cows
http://jds.fass.org/
cgi
/content/full/87/6/1886
124i)Grazing Boosts Levels of Possible Cancer-fighter in Cows' Milk
http://www.cals.wisc.edu/media/news/09_97/
CLA
_in_
milk.html
124j)
CLA
references
http://www.wisc.edu/
fri
/clarefs2004.
htm
124k)
CLA
http://www.fst.ohio-state.edu/People/HARPER/Functional-foods/Milk%20Components/Conjugated%20Linoleic%20Acids.htm
-
CLA
EFFECTS & HUMANS
125)
Bioconversion
of
vaccenic
acid to conjugated
linoleic
acid in humans -
Turpeinen
http://www.ajcn.org/
cgi
/content/abstract/76/3/504
126)
CLA-Fortified
Dairy Products: Evaluation After Processing and Storage
http://jds.fass.org/
cgi
/content/full/90/5/2083
127)Dietary trans-10,
cis
-12 conjugated
linoleic
acid induces
hyperinsulinemia
and fatty liver in the mouse
www.jlr.org/
cgi
/content/abstract/43/9/1400
128)Human Colostrum
http://content.karger.com/
ProdukteDB
/
produkte.asp
?
Doi
=47060
129)Conjugated
Linoleic
Acid Differentially Modifies Fatty Acid Composition -
Demaree
http://jn.nutrition.org/
cgi
/content/abstract/132/11/3272
130)
CLA
and Grass-fed Beef
http://www.alderspring.com/health_benefits/html/
cla.html
131)
CLA
& Renal Disease
http://www.nature.com/
ki
/journal/v64/n4/full/4494013a.html
132)
CLA
& Cancer, Atherosclerosis and Obesity
http://findarticles.com/p/articles/mi_qa4035/is_/ai_n9390461?tag=untagged
http://74.125.47.132/search?q=cache
134)
CLA
& Hypertension
www.partners-popdev.org/doc/reports/
AmJHypertens
_2006_19_4_381.
pdf
135)
CLA
& Food Storage
http://jds.fass.org/
cgi
/content/full/90/5/2083
-
SATURATED FATS
136) Saturated Fat -
Mercola
http://articles.mercola.com/sites/articles/archive/2002/08/21/saturated-fat2.
aspx
http://articles.mercola.com/sites/articles/archive/2002/08/21/saturated
-fat2.html
[ ]
138) Saturated Fat - Controversy
http://en.wikipedia.org/
wiki
/Saturated_fat
139) Trans/Sat Fat
LDL
/
HDL
NEJM
Ascherio
1999
https://content.nejm.org/
cgi
/content/extract/340/25/1994?ck=
nck
140) Lipoprotein(a) is a risk for cardiovascular disease
http://en.wikipedia.org/
wiki
/Lipoprotein(a)
141) LA>
CLA
in Human Intestine
http://jb.asm.org/
cgi
/content/full/189/6/2566
142)
PUFA
newsletter
http://www.fatsoflife.com
143)
CLA
supresses
Colon Cancer
http://www3.interscience.wiley.com/journal/118804219/abstract
144) LA and Metabolites cause Cardiac Arrest in Dogs
http://jpet.aspetjournals.org/
cgi
/content/abstract/303/1/347
145) Metabolism of
Linoleic
Acid
http://cat.inist.fr/?
aModele
=
afficheN
&
cpsidt
=817919
145a) Future of Milk Fat Modification - O’DONNELL
jds.fass.org/
cgi
/content/abstract/76/6/1797
146)
LNA
important for Retinal Function
http://www.sciencemag.org/
cgi
/content/abstract/188/4195/1312
147)
CLA-enrched
Butter reduces Cancer in Rats
http://jn.nutrition.org/
cgi
/content/abstract/129/12/2135
148)
FO
+LA increases
CLA
and TVA in Milk
http://jds.fass.org/
cgi
/content/abstract/86/3/944
149)
CLA
effects on Adipose
http://jn.nutrition.org/
cgi
/content/abstract/132/11/3272
150)
DHA
/EPA content of Enhanced Milk
http://www.hc-sc.gc.ca/fn-an/
gmf-agm
/
appro
/dec104-
eng.php
150a) What is Butter
http://webexhibits.org/butter/
composition.html
150b) Butter Oil Properties Review [interesting*]
http://www.greenpasture.org/products/butter_oil/properties
-
TVA,
CLA
DISEASE ATHEROGENICITY
151) Hi
CLA
effects on
Atherogenicity
http://www.ncbi.nlm.nih.gov/
pubmed
/17992982
152) Soybean Oil Feed to Goats Increases
CLA
http://jds.fass.org/
cgi
/content/abstract/91/6/2399
153)
CLA
isomers and Cancer
http://jn.nutrition.org/
cgi
/content/abstract/137/12/2599
154)
CLA
Lipoprotein Effects
CLA
does not increases
LDL
http://linkinghub.elsevier.com/retrieve/
pii
/S0021915005006702
155) LA, Butter increase Lipid
Peroxidation
but not Atherosclerosis
http://jn.nutrition.org/
cgi
/content/abstract/138/3/509
-
ESSENTIAL FATTY ACIDS
156) Fat Content Foods
http://curezone.com/foods/
fatspercent.asp
157) The skinny on Fats (Price Foundation) good overview
http://www.westonaprice.org/
knowyourfats
/
skinny.html
158)Hemp plus
http://www.sanihemp.com.au/web/
WhyHempSeedOil.html
?
PHPSESSID
=b98699cba5953725bc7b7c83a28cfa81
158a) Nutritional Profile and Benefits of Hemp Seed, Nut and Oil
http://www.drbronner.com/
pdf
/
hempnutrition.pdf
159) Plant Seeds
http://www.naturalhub.com/natural_food_guide_nuts_
common.htm
160)
DHA
in Plant seeds/
GeneSplicing
http://www.csiro.au/science/ps3u.html
161)
DHA
Milk
http://www.hc-sc.gc.ca/fn-an/
gmf-agm
/
appro
/dec104-
eng.php
162)Peanut Nutrition
http://www.nutritiondata.com/facts/legumes-and-legume-products/4357/2
163)
EFA
/Andy
Pryke
http://www.andypryke.com/pub/
EssentialFattyAcids
163a)EPA
http://en.wikipedia.org/
wiki
/
Eicosapentaenoic
_acid
163b)
DPA
http://en.wikipedia.org/
wiki
/
Docosapentaenoic
_acid
163c)
DHA
http://en.wikipedia.org/
wiki
/
Docosahexaenoic
_acid
163d)
DGLA
http://en.wikipedia.org/
wiki
/
Dihomo-gamma-linolenic
_acid
163e)AA
http://en.wikipedia.org/
wiki
/
Arachidonic
_acid
-
OA
164) Conversion of Oleic Acid to Trans Isomers
http://jds.fass.org/
cgi
/content/abstract/88/12/4334
-
EVOO
165) Extra-Virgin Olive Oil Increases Resistance Of
LDL
To Oxidation
http://findarticles.com/p/articles/mi_m0887/is_/ai_59017968
166) Dietary extra-virgin olive oil with added omega-3 fatty acids -
WIPO
www.wipo.int/
pctdb
/en/
wo.jsp
?IA=WO2004002234&
wo
=2004002234&DISPLAY=CLAIMS
167) Olive Oil Primer
http://en.wikipedia.org/
wiki
/Olive_oil
168) How Olive Oil Works - production
http://recipes.howstuffworks.com/how-olive-oil-works2.
htm
169) The Real Story on OLIVE OIL
http://www.diabetesincontrol.com/
results.php
?
storyarticle
=2508
170) A taste for the extra-virgin olive oils -
CASTRONOVO
http://yudelstake.blogspot.com/2008/01/
taste-for-extra-virgin-olive-oil.html
172)
Linoleic
Acid, but not Oleic Acid,
Upregulates
Production of
Interleukin
-8
http://rsx.sagepub.com/
cgi
/content/abstract/12/8/593
173)
EVOO
are not creates equal
http://www.elikioliveoil.com/
goodoloilish.html
174) Definitions - The Olive Oil Source
http://www.oliveoilsource.com/
definitions.htm
175) Grandpa Po's Originals Definitions
http://www.nutranuts.com/
definitions.html
176) Olive oil: more than just oleic acid
http://www.ajcn.org/
cgi
/content/full/72/3/853
177) Olives -
WHFoods
http://www.whfoods.com/
genpage.php
?
tname
=
foodspice
&
dbid
=46
178) Olive Oil -
WHFoods
http://www.whfoods.com/
genpage.php
?
tname
=
foodspice
&
dbid
=132
179) Olive Oil versus Palm Oil
http://www.palmoiltruthfoundation.com/
index.php
?option=com_content&task=view&id=48&
Itemid
=78
179a) Oleic Acid
http://en.wikipedia.org/
wiki
/Oleic_acid
179b) Conversion of Oleic Acid to
natural
Trans
Isomers pH Effects
http://jds.fass.org/
cgi
179c) Proposed Standards for
Ollive
Oil
http://www.cooc.com/proposed_
standards.htm
179d)
EVOO
increases resistance of
LDL
to Oxidation
http://findarticles.com/p/articles/mi_m0887/is_/ai_59017968
179e) Oleic acid, the main monounsaturated fatty acid of olive oil,
suppresses Her-2/
neu
(
erb
B
-2) in Breast Cancer cells
http://annonc.oxfordjournals.org/
cgi
/content/abstract/mdi090v1
179f) Olive oil's health benefits
http://www.healingdaily.com/detoxification-diet/
olive-oil.htm
179g) Chemical and Nutritional Properties of Olive Oil
http://www.oliveoilsource.com/
olivechemistry.htm
-
HFCS
180) CH20 carbohydrates 306
http://wserver.scc.losrios.edu/~ropers/Chem%20306%20Chapter%2020%20Carbohydrates%20lecture%20outline.pdf
181) Ch21 lipids 306
http://wserver.scc.losrios.edu/~ropers/Chem%20306%20Chapter%2021%20-%20Lipids%20lecture%20outline.pdf
182) Sucrose
http://en.wikipedia.org/
wiki
/Sucrose
183) Carbohydrates
www.elmhurst.edu/~
chm
/
onlcourse
/CHM103/Rx16Bcarbo.ppt
184) Cyclic AMP Fructose Uptake -
Cui
http://jn.nutrition.org/
cgi
/content/full/134/7/1697/F3
185) Fructose
http://en.wikipedia.org/
wiki
/Fructose
186) Consumption of high-fructose corn syrup in beverages may play a role in the epidemic of obesity - Bray
http://www.ajcn.org/
cgi
/content/abstract/79/4/537
http://www.ajcn.org/
cgi
/reprint/79/4/537
http://www.ajcn.org/
cgi
/content/full/80/4/1090
187)
OurFood
Database of Food and Related Sciences
www.ourfood.com/
OurFood.pdf
188) Glucose
http://en.wikipedia.org/
wiki
/Glucose
189)
Anomeric
specificity of D-glucose metabolism in rat A
dipocytes
-
Malaisse-Lagae
http://www3.interscience.wiley.com/journal/120763043/abstract
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