Recent clinical studies suggest that SELENOMAX high-selenium yeast is the preferred form of the antioxidant selenium. Product with vitamin E. . Selenium is essential for the functioning of the biologically important enzyme glutathione peroxidase an antioxidant whose primary role is the destruction of intracellular hydrogen peroxide and other hydroperoxides this helps to maintain the health and integrity of tissues protecting them from free radicals. . .Other products from HerbsPro