Overview Natural Factors Selenium is a mineral supplement for the maintenance of healthy body cells and good health. Selenium is a vital antioxidant whose principal function is to inhibit the oxidation of fats. It protects the immune system by preventing free radicals from damaging the body. Medicinal Ingredients Each tablet contains: Selenium (yeast) 100 mcg Non-Medicinal Ingredients Dicalcium phosphate dihydrate, microcrystalline cellulose, vegetable grade magnesium stearate (lubricant). . Advanced Info Selenium is a vital antioxidant with properties that may slow down the aging and deterioration of tissues caused by free radical damage. It protects the immune system by preventing the formation of free radicals that can damage the body and preserves the elasticity of tissue that become less elastic with aging. Selenium also aids in fighting infections and has been shown to play a role in thyroid gland activity. Selenium is important for the formation of antibodies, the binding of toxic metals like mercury, amino acid metabolism, and the promotion of normal body growth and fertility. It is also necessary for the production of prostaglandins – substances that affect blood pressure, and works closely with vitamin E to support cardiovascular health by preventing the oxidation of LDL (“bad”) cholesterol and slowing the aging and hardening of the arteries. Natural Factors Selenium is a mineral supplement providing antioxidant protection for the maintenance of healthy body cells and good health.