(Brookside) Combines the anti-oxidant properties of Vitamin E with chelated forms of zinc and selenium, which is sometimes depleted from the soils on which hay is grown. This superior supplement provides 2,483 IU of Vitamin E per day in the preferred forms of selenium (selenomethionine) plus Ester-C for enhanced absorption. Feed 10 grams (1/3 ounce) daily with feed, or as directed by your veterinarian or equine nutritionist. Scoop enclosed. Powder.