Function:
Vitamin E is a potent antioxidant in the body slowing the
rate of oxidative destruction of biological membranes. It
has also been shown to prevent oxidation of LDL (bad) cholesterol
making it incapable of penetrating blood vessel walls and
other tissues. By protecting LDL from oxidation it may prevent
or slow many of the complications of atherosclerotic disease.
Research in this area remains incomplete but promising.
Large population studies suggest protection from vascular
disease with vitamin E intake above the RDA.
Recommended
Dietary Allowance:
The
RDA is 15 mgs per day for both men and women. Alpha-tocopherol
is the only form of vitamin E that can be fully utilized
in the body.
Deficiency:
Deficiencies are reported only in individuals with inherited
abnormalities.
Sources:
It
is found in nuts, seeds, liver, vegetable oils, yellow-green
vegetables, eggs, and whole grain foods.
Toxicity
and UL:
A
review of vitamin E toxicity studies concluded that humans
show few side effects following supplemental doses less
than 2,100 mg per day. Because of concern about the potential
of bleeding the UL has been set at 1,000 mgs per day of
alpha-tocopherol. Individuals taking anticoagulant medications
should talk to their physician before starting supplementation
with either vitamin E or vitamin K.
