For-A-Flex Biotin Formula For-A-Flex Biotin Formula provides multiple benefits and noticeable results for your horse's hooves, coat, skin, and general health. This premium supplement features Bio-Golden, which allows your horse to better utilize the scientifically formulated hoof and coat-building nutrients, as well as the essential nutrients found in its normal ration. Fortified with essential amino acids Methionine and Lysine and chelated mineral complexes to assure excellent bio-availability of all ingredients, the highly palatable granular formula is easy to administer - just add to your horse's daily feed. Item Specifications: Daily Dosage: 1 oz. per 1,000 lb. Ingredients: Crude Protein: 38% Methionine: 10.85% Lysine: 6.9% Biotin: 640mg/lb.