Selenium is an essential dietary mineral and an essential part of several glutathione peroxidases, powerful antioxidant and anti-inflammatory enzymes made by the body. Selenium supplements, 200 mcg daily, increase the body's production of glutathione peroxidases. These compounds enhance resistance to infection, which reduces one source of inflammatory reactions and also prevents very dangerous mutations in flu and other viruses. In addition, a human trial at the University of Arizona, Tucson, found that selenium supplements reduced the risk of breast and prostate cancers by about half.
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