Selenium is considered as a trace metal because our bodies require only a small amount for its antioxidant capabilities.  Selenium is used to activate enzymes in your body to prevent free radical damage to your cells and increases in effectiveness when taken with Vitamin E and Lycopene as found in our Lyco-BoostTM Silexin formulation.  Free radicals are molecules that are created in body as side-products in our daily metabolic functions that bombard and damage our cells, which increase the chances of tumors.