This selenium supplement provides potent antioxidant selenium to fight free radical damage. Not only does selenium protect from oxidative stress, it also works with vitamin E to support eye and cardiovascular health. Selenium naturally appears in water and food, but supplementation can lead to increased benefits. Selenium also makes up selenoproteins which help make DNA and are involved in reproduction and the metabolism of thyroid hormones. Our selenium supplement is free of yeast and other common allergens.