The principal function is Selenium is to inhibit oxidation of lipids (fats). It is a potent and vital antioxidant, especially when combined with vitamin E. It protects the red blood cells by preventing free-radials, which can damage the body. Selenium and vitamin E act synergistically to aid in the production of antibodies, and, help maintain healthy heart and liver. This trace element is needed for pancreatic function and tissue elasticity, and combined with vitamin E and zinc, may provide relief from an enlarged prostate. Selenium supplementation has been found to protect the liver in people with alcoholic cirrhosis (along with a liver cleanse).