Selenium is a trace mineral essential to health. Selenium, Vitamin C and Vitamin E are synergistic antioxidants. Trophic 's Selenium with C & E is formulated to help support the immune system. These antioxidants prevent free radical accumulation in the system and are active in helping the body neutralize environmental carcinogens, thus reducing the incidence of cancer, protecting the liver and cardiovascular system. The addition of Vitamin C assists in maintaining healthy bones and skin and promotes the body€?s absorption of iron. The special synergistic relationship means that each ingredient reacts with the others to improve their individual effectiveness.