U-Gard Powder is a calcium magnesium supplement to soothe and coat the gastrointestinal tract. Super-concentrated formula allows you to use one product instead of three. U-Gard Powder contains calcium carbonate, magnesium hydroxide, methylcellulose, silicone dioxide, kaolin, pectin and more. Feed 1 oz. twice daily with horse's feed. Feed 1 oz. twice daily with horse's feed.