Abstract: A composition for enhancing the performance of animals, such as horses or dogs, is composed of adrenal and pituitary raw tissue concentrates, vitamin C, bioflavonoid complex, pantothenic acid, methionine, choline, vitamin B1, vitamin B2, vitamin B6, niacinamide, magnesium, vitamin B12, folic acid and organic iodine. The composition is adapted to be orally administered to an animal, is composed of all natural substances, and the relative proportions of the components are approximately:at least 40 parts adrenal raw tissue concentrate toat least 2 parts pituitary raw tissue concentrate to30-60 parts vitamin C to20-30 parts magnesium to10-20 parts of each of pantothenic acid, methionine and choline to8-15 parts of each of niacinamide and bioflavonoid complex to1-5 parts of each of vitamins B1, B2 and B6 to0.1-1 parts organic iodine to0.05-0.5 parts folic acid.