100% Natural source Vitamin E is a key nutrient for heart health, immune support and nerve and muscle function. This product contains additional tocopherols: beta, delta and gamma. As a powerful antioxidant, Vitamin E is an essential ally against pollution, aging, toxins and other causes of free radical damage. This is a form which includes mixed tocopherols (alpha, beta, gamma and delta) which may contribute to a greater health effect than alpha tocopherol alone. Vitamin E"s ability to protect cell membranes makes it valuable for people in polluted environments and those with active lifestyles, as physical exertion increases production of free radicals. Approximately 400 IU of vitamin E reduces exercise-induced free radical damage and helps with athletic performance. Experts agree that obtaining adequate vitamin E from the daily diet is difficult and therefore recommend daily supplementation. Men and women who supplement with at least 100 IU of vitamin E per day have a 37-41% drop in the risk of heart disease. CHAOS (Cambridge Heart Antioxidant Study) reported a 77% drop in nonfatal heart attacks when people were given 400-800 IU of vitamin E per day. Natural source vitamin E, designated by the prefix D, (D-alpha-tocopherol) is almost twice as bioavailable as synthetic vitamin E, designated by the prefix DL (DL-alpha-tocopherol). D-alpha-tocopheryl acetate, an ester of alpha tocopherol, is a very stable form of vitamin E and is equally effective in humans.