Vitamin E in supplements is usually sold as alpha-tocopheryl acetate,
a form that protects its ability to function as an antioxidant.
Antioxidants such as
vitamin E act to protect cells against the effects of free radicals.
Free radicals are potentially damaging by-products of energy
metabolism. Free radicals can damage cells and may contribute to the
development of cardiovascular disease and cancer.
Studies are underway to
determine whether vitamin E, through its ability to limit production
of free radicals, might help prevent or delay the development of these
chronic diseases. Vitamin E has also been shown to play a role in
immune function, DNA repair, and other metabolic processes.
Vitamin E deficiency is
rare in humans. Blood levels of vitamin E may be decreased with zinc
deficiency. Vitamin E deficiency is usually characterized by
neurological problems associated with nerve degeneration in hands and
feet. These symptoms are also associated with other medical
conditions. A physician can determine if they are the result of a
vitamin E deficiency or are from another cause.
|