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Vitamin >>> Selenium >>>

Selenium, like many of the trace elements, is essential in the human body, but
due to potential toxicity, selenium should be taken with care. Adequate levels
of selenium have been shown to protect against some cancers and other
diseases such as arteriosclerosis, arthritis, cirrhosis, and emphysema. It acts
as an antioxidant and may even stimulate the immune system leading some
researchers to believe that selenium may even extend lifespan.

Deficiencies in selenium have generally been seen in areas where people eat
food from selenium-poor soil - primarily in China. Interestingly, people in
these areas also have higher cancer and stroke rates. In addition to the
connection with cancer, it appears that low levels of selenium may be an
important factor in heart disease. Other symptoms of selenium deficiency may
include birth defects (if the mother is selenium deficient), rheumatoid arthritis,
cataract formation, and anemia. Those at risk for moderate selenium
deficiency include vegetarians, the elderly, smokers, pregnant women and
nursing mothers.

Food sources include fresh vegetables, grains, fish, and organ meat.
Remember that the selenium content in food is dependent on the soil in which
it is grown. The current RDA is 70 micrograms for men and 55 micrograms
for women. While supplements can be taken, selenium is highly toxic and must
be used with care. Symptoms of toxicity include garlic breath and skin, fragile
or black fingernails, metallic taste, dizziness and nausea. Vitamin C should not
be taken with selenium as it interferes with its usefulness.

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