Selenium is an essential trace mineral and an important co-factor in several enzymatic reactions in the human body, including the powerful glutathione antioxidant system. Different forms of selenium naturally exist. The methylselenocysteine (MSC) form of selenium is of particular interest among nutritionally oriented doctors and those interested in supporting cellular immune function. MSC readily converts to methylselenol, and this is the form that research has shown to support cellular health and immune function, both offensively and defensively.These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.