Minerals are important factors utilized by the body to stay healthy and support its many functions. Selenium is an essential mineral shown to provide antioxidant support and help boost the immune system.* Antioxidants are substances that help inhibit oxidation and the damaging effects of free radicals. Exposure to environmental pollutants, everyday stress, and even natural body processes that convert oxygen to energy all create damaging free-radical compounds in the body that contribute to physical and mental aging, damage and disease. Cells, proteins and DNA are all subject to attack and damage from free radicals. Antioxidants are an integral part of the body's free radical defense system and work as scavengers to help neutralize harmful free radicals and protect cells from damage. Selenium is vital in the production of the enzyme glutathione peroxidase, which is part of the body's primary internal antioxidant defense system. Selenium is found in nearly every cell in the body. Selenium is incorporated into proteins to make selenoproteins, which are important antioxidant enzymes. Fruits and vegetables are major sources of selenium, but the actual amount of selenium in any particular fruit or vegetable is dependent on the selenium content of the soil in which it is grown. If the selenium soil content is depleted, low selenium intake can occur. Meats and bread are also common sources of dietary selenium, along with some nuts, however specific amounts may vary. Selenium may also be destroyed when foods are overcooked, over-processed or over-refined. Though required only in small amounts, selenium supplementation is an easy way to ensure the body receives this important mineral. Bronson's Selenium 200 mcg provides selenium in an amino acid chelate form.* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.