DEFINITION OF TOCOTRIENOL
Vitamin E is one of the most important phytonutrients in edible oils. It consists of eight naturally occuring isomers, a family of four tocopherols (alpha, beta, gamma and delta) and four tocotrienols (alpha, beta, gamma and delta) homologues.
All the eight isomers share some important traits:
The head, or chroman ring in technical term
The tail, which is called the phytyl tail for tocopherols
The active group on the head of the molecule, which is called the hydroxy group
The chroman ring has chemical groups which are called methyl groups attached to it. Alpha has all three available sites filled while beta and gamma have two methyl groups but in different positions. Whereas delta has only one.
The tocotrienol tail has three double bonds while the tocopherol tail has none. In the chemical parlance, bonds are the forces that keep atoms together. A single bond means the atoms share two electrons, a double bond means they share four electrons.
The structural name for alpha-tocopherol is 2,5,7,8-tetramethyl-2-(4',8',12'-trimethyltridecyl)-6-chromanol.
The structural name for alpha-tocotrienol is 2,5,7,8-tetramethyl-2-(4',8',12'-trimethyltrideca-3',7',11'-trienyl)-6- chromanol.
SOURCES OF TOCOTRIENOLS
Edible oil originating from plants are rich source for tocotrienols. Crude palm oil extracted from the fruits of oil palm (Elaeis guineensis) particularly contains a high amount of tocotrienols (up to 800 mg/kg), mainly consisting of gamma-tocotrienol and alpha-tocotrienol. It also contain the most potent form of all commercially available tocotrienols - delta-tocotrienol.
Tocotrienols are also found in oil derived from rice bran, barley, wheat germ and rye.Common sources of tocotrienols are:
Palm
Rice
Wheat
Barley
Rye
Oat
Tocotrienols From Normal Diet Alone
Since tocotrienols only occur at very low levels in nature, with the highest concentration found in palm oil, so it is virtually impossible to attain the amount of tocotrienols that show beneficial effects from the normal diet alone. For example, one would need to consume a cup of palm olein (cooking oil) a day to get the level required for effectiveness as described in most studies.
Sources
Amount Taken To Achieve the Required Levels of Tocotrienols
RBD Palm Olein (Cooking Oil)
1 tea cup (~ 80 g)
Rice Bran Oil
2 tea cup (~ 160 g)
Barley
3.0 kg
Wheatgerm
1.5 kg
Oats
4.0 kg
HEALTH BENEFITS
Cholesterol Reduction
Inhibit cholesterol production in the liver, thereby lowering total blood cholesterol.
Alpha tocotrienol suppresses hepatic HMG-CoA reductase activity that results in the lowering of LDL cholesterol levels.
Tocotrienols which are naturally occurring in palm oil have been shown to suppress lower plasma cholesterol in human.
Combination of gamma-tocotrienol and alpha-tocopherol is found as a potential hypolipemic agent in hyperlipemic humans at atherogenic risk.
Tocotrienols inhibit cholesterogenesis by suppressing HMG-CoA reductase.
Reversing Arteriosclerosis
Reverses arterial blockage (carotid arteriosclerosis), hence reducing the risk factors for cardio-vascular diseases such as arteriosclerosis and stroke. Palm based tocotrienols is the first and natural compound to be shown by human study, to have the ability to reverse arteriosclerosis.
Medical human research showed that patients with confirmed carotid arteriosclerosis, who consumed 240mg of palm based tocotrienols/ day for 18-36 months had a decrease in the amount of cholesterol plaque in their carotid artery while those receiving placebo did not show such an effect.
Palm based tocotrienol protects the ApoE knockout mice against cholesterol build-up and hence prevent arteriosclerosis.
Protection Against Ischemia/Reperfusion Heart Injury
Medical study suggests that palm based tocotrienols were more efficient than alpha-tocopherol alone in the protection of the heart against oxidative stress induced by ischemic reperfusion.
Inhibit of Platelet Aggregation
Delta-tocotrienol was significantly more potent than the alpha and gamma-tocotrienols, in the inhibition of platelet aggregation.
Palm based tocotrienols may serve as an antithrombotic agent by decreasing platelet aggregation significantly.
Anti-cancer and Tumour Suppresive
Palm based tocotrienols had shown to inhibit human breast cancer cells irrespective of estrogen receptor status. Tocopherol has no effect at all on human breast cancer cells.
Delta - tocotrienol was found to be the most effective tocotrienols in inducing apoptosis (cell death) in estrogen-responsive and estrogen-nonresponsive human breast cancer cells.
Confer anti-cancer properties.
Inhibit tumor growth of certain cancers.
Alpha-tocotrienol and gamma-tocotrienol have shown to prolong the life span of cancer-infected mice.
Gamma-tocotrienol is 3 times more potent in inhibiting growth of human breast cancer cultured cells than Tamoxifen.
Potent Natural Super - Antioxidant
Alpha-tocotrienol has been shown to be 40 - 60 times more potent than alpha-tocopherol as an antioxidant in the prevention of lipid peroxidation.
Delta-tocotrienol is the most potent antioxidant (highest antioxidant potency) of all commercially available tocotrienols and has been shown to be the most effective tocotrienol in inhibiting human breast cancer and liver cancer cells.
Effective antioxidant in the prevention of protein oxidation and lipid peroxidation after strenous exercise for athletes, joggers and body builders.
Anti - Aging / Cosmetics and Personal Care
Preferentially accumulates at the strata corneum of the skin. First line of defense against free radicals generated in the skin by UV/ozone rays. Prevention of skin aging and damage by oxidative rays. Being a more potent antioxidant, the tocotrienols neutralizes free radicals at a faster rate and hence protect tocopherols.
Protection against UV-induced skin damage and skin aging.
Tocotrienols topically applied onto the skin was found to penetrate rapidly through the skin and the highest concentrations are found in the uppermost 5 microns.
Tocotrienol-treated skin contained Vitamin E at concentration 7-30 fold higher than control values.
Tocotrienol augments the efficacy of sunscreens containing compounds that reduce penetration of or absorb ultraviolet radiation.
Lower Blood Pressure
Palm gamma-tocotrienol has ability to prevent development of increased blood pressure in Spontaneously Hypertensive Rats (SHR) after 3 months supplementation.
Scientific References for Tocotrienols· Antioxidant Activity · Cholesterol Reduction · Cardiovascular Health & Protection · Cancer Prevention - Breast Cancer · Cancer Prevention - Liver Cancer · Anti-Cancer - General· Anti-Aging· Neuroprotective Property · Distribution & Bioavailability· Analytical & Isolation Methods· Sources, Chemistry & Metabolism· Toxicology & Other Health Benefits


