GENERAL DESCRIPTION:
Selenium is an essential trace element found
in organ meats, tuna, seafood, brewer’s yeast, fresh garlic, mushrooms, wheat germ, and some
whole grains
ROLE IN ANTI-AGING:
Selenium is necessary for the body’s growth
and protein synthesis. It helps to increase
effectiveness of vitamin E, and acts as an antioxidant to protect cells from the free
radical damage that causes aging and is linked to many age-related diseases. Results of two 5-year-long studies at Cornell University and the
University of Arizona revealed that taking just 200 mcg of
supplementary selenium each day cut the incidence of
prostate cancer by 63%, colorectal tumors by 58%, and lung
cancer by 46%. Altogether, the death rate from cancer of people who took 200mcg of selenium was
found to be 39% lower than that of the general population.
Selenium may help to prevent heart disease by increasing
levels of “good” HDL cholesterol and lowering levels
of “bad” LDL cholesterol, and reduce heart attack and stroke risk by decreasing the “stickiness”
of the blood, and therefore reducing the risk of blood
clots. Results of research published in 2001 revealed that
people with the highest intake of selenium were 50% less likely to have asthma, compared with
those who consumed the least.
Low selenium levels have also been linked to
an increased risk of prostate cancer. Selenium also protects against toxic pollutants for
sexual reproduction, helps to eliminate arsenic, and protect
against the effects of cadmium and mercury. The mineral is
also a component of glutathione peroxidase,
which protects tissues from the effects of polyunsaturated fatty acid oxidation. Studies suggest
that selenium and glutathione may play a key role in slowing
the spread of HIV infection in the body. Research has shown
that selenium can help to alleviate
hot flushes and other symptoms of the
menopause.
DEFICIENCY SYMPTOMS:
Dandruff, decreased growth, premature aging, infertility, and increased risk of cancer and
heart disease. Infant deaths have also been associated with
selenium and/or vitamin B deficiency,
THERAPEUTIC DAILY AMOUNT:
The RDA of selenium is 55mcg, however many experts recommend a daily intake of 100-200mcg.
MAXIMUM SAFE LEVEL:
The maximum safe level is 200mcg for longterm
usage and 700mcg for short-term usage. Supplementation at levels greater than 800 mcg a day
may be toxic. The Food and Nutrition Board states that overt
selenium toxicity may occur in humans ingesting
2,400-3,000mcg
SIDE EFFECTS/CONTRAINDICATIONS:
Side effects are rare, but can include dizziness,
nausea, brittle fingernails, and hair loss.
SOLUBILITY:
water
