Selenium is the most efficient antioxidant. It prevents cellular and subcellular lipids and fats 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.