Selenium Plays Many Vital Roles. Its Principal Function is to Inhibit the Oxidation of Fats.
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Selenium is an essential component of the glutathione peroxidase antioxidant system, which helps combat the effects of free radicals and plays an important role in thyroid hormone metabolism. (1) It has also been shown to help support a healthy immune system by preventing the formation of free radicals. (2 In addition, many studies have shown that it is important for retaining prostate health. (3)
It is a vital antioxidant especially when combined with Vitamin E.
It also plays a vital role in regulating the effects of thyroid hormone on fat metabolism. Its principal function is to inhibit the oxidation of fats. This mineral supports healthy functioning of the cell membranes and pancreatic function. It has also shown promise in the research of arthritis. cardiovascular disease, male infertility, cataracts, AIDS, and high blood pressure.
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It is found mostly in grains and seeds, though their mineral content depends on the amount of it in the soil in which they are grown. Seafood, kidney, liver, and other meats are also high in this substance.The RDA for this mineral is 55 mcg per day for men and women, 60 mcg per day for pregnant women, 20-40 mcg per day for children, and 40-55 mcg per day for adolescents. (5) The suggested maximum intake for it is 550 mcg per day. Intakes of over 750 mcg may result in biochemical changes in nail beds, interference in sulfur metabolism, and inhibition of protein synthesis. (6) The mechanisms for toxicity are not known. I personally take an everyday supplement that contains 100 mcg per serving 2 times a day.
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New Page 1References
1. Holben DH, Smith AM. Diet Assoc 1999;99:836-43.
2. Baum MK. Proc First Inter Bio-Minerals Symposium. April 19-20, 2001.
3. Blumenfeld AJ, et al. Can J Urol 2000;7:927-35.
4. Institute of Medicine. Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids (2000).
National Academies Press: Washington, D.C.
5. U.S. Department of Health and Human Services. Toxicological Profile for Selenium. Atlanta, GA: U.S.
Department of Health and Human Services, Public Health Service; 2003.
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