Selenium is one of the most efficient antioxidants. It prevents cellular and subcellular lipds and cats from being peroxided, or becoming rancid. Selenium is also instrumental in supporting both a healthy immune system and cardiovascular system. In processing, FDA & GMP guidelines are observed and strictly followed. Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, prevent, or cure any disease.