A vitamin and mineral supplement for horses low in Vitamin E and selenium or for periods of intense work and stress. Selenium is an antioxidant and plays a key role in proper thyroid function. The addition to feed of higher levels of this product containing selenium is not permitted. Guaranteed Analysis: Vitamin E - 20,000 I.U. / lb minimum, Selenium - 35 ppm minimum, Ingredients: Dried Brewers Yeast, Distillers Dried Solubles & Grains, Calcium Carbonate, Vitamin E Supplement, Processed Grain By-Products, and Sodium Selenite. Directions: To control proper Vitamin E and selenium ratios, feed one ounce of E-SE per 1000 pound horse per day. Adjust E-SE amount according to horses body weight. One ounce supplies 1250 I.U. of Vitamin E and 1 mg of selenium.