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Vitamin E is the thought to be the most
effective antioxidant known to function in the body. Vitamin E actually
identifies a group of fat soluble compounds known as tocopherols
and tocotrienols.
The most vital function vitamin E performs
is helping to stabilize cell membranes and guarding against damage
to body tissues caused by oxidation. Vitamin E acts as a powerful
antioxidant which protects against damage caused by free radicals,
which can contribute to cardiovascular disease and cancer. When
applied to skin, vitamin E creams are thought to promote healing
and protect the skin from damage. Vitamin E deficiency can impact
the central nervous system and could result in progressive neuromuscular
disorders resulting in impaired reflexes, muscular weakness, and
loss of balance. A deficiency can also lead to an increased risk
of cardiovascular disease and some cancers. Read more about the
benefits
and functions of vitamin E and signs of vitamin
E deficiency.
Vitamin E can be obtained from a variety of
common foods, including vegetable oils (such as soybean, corn, and
cottonseed oils) and products which contain these oils), wheat germ,
nuts, peanut butter, fish, and green leafy vegetables. Regarding
grains, vitamin E is located in the germ of the grain. Whole-wheat
flour generally retains a good portion of the original germ, so
it can be a good source. On the other hand, refined, or white, flours
are generally stripped of most nutrients, including vitamin E. Read
more about sources
of vitamin e and the daily
requirement of vitamin e.
The risk of vitamin E toxicity is low, however
some side effects have been observed related to large doses of vitamin
E including headaches, nausea, double vision, weakness and gastrointestinal
problems. Read more about vitamin
E overdose.
Vitamin E actually refers to a family of compounds
consisting of four tocopherols and four tocotrienols, each identified
as alpha, beta, gamma, or delta depending on small differences in
their chemical structures.
Alpha-tocopherol is the most active form of the vitamin for the
human body, and is the only type actively maintained in the bloodstream,
and thus, is the form found in the largest quantities in the human
body. In the general food supply, alpha-tocopherol consists of about
three-quarters of the total vitamin E. Gamma-tocopherol consists
of about 20%, and beta-tocopherol and alpha-tocotrienol combined
consist of the other 5%.
Approximately 90% of the vitamin E that is stored in the human body
is found in adipose tissues, with the other 10% stored in cell membranes.
The absorption of vitamin E into body tissues is a slow process.
Reserach has indicated that, at minimum, two years of supplementation
would be needed before a change in tocopherol concentrations could
be observed.
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