Powder supplement provides a balanced vitamin and mineral profile to support normal muscle function, immune function and reproductive function. Adequate amounts of vitamin E and selenium prevent detrimental interaction of peroxides with lipid membranes of muscle cell. For use in diets of all classes of horses. Each scoop contains 1,250 IU vitamin E and 2 mg organic selenium. What makes dac Formula E and SE different? Vitamin E – Fat-soluble vitamin that has an important role as a potent antioxidant. It has a concurrent yet independent role with selenium, an essential trace mineral. Together they act to maintain normal muscle function, aid in the prevention of muscular disease and perform as antioxidants to protect body tissues, particularly cell membranes, enzymes and other intracellular substances, from oxidation-induced damage. Horses with an inadequate reserve of antioxidants might experience poor immunity to disease, muscle soreness or stiffness during an exercise bout and prolonged recovery following hard work. Organic Selenium – Selenium is an essential trace mineral that plays a critical role in metabolism, healthy growth, reproductive health and immunity. It also acts as a powerful antioxidant to prevent fatty acid oxidation which can cause tissue damage. Selenium also plays a role in the control of thyroid hormone metabolism. Research has shown that Sel-Plex, an organic form of selenium, is more readily absorbed and retained than selenium in inorganic forms. Sel-Plex is the ONLY organic selenium to be reviewed by the FDA (Food and Drug Administration). Selenium deficiency may be a factor in causing muscle conditions otherwise known as tying-up. In young horses selenium deficiency can manifest as a condition known as white muscle disease.