Formulated to provide the necessary supplementation of the 3 most limiting essential amino acids to help drive muscle health and optimal performance in todays equine athletes. Recommended for use in lesson horses, performance horses, work horses, young horses, muscle deficiencies and anywhere amino acid supplementation is needed.Each lb contains 21% crude protein, 10.6% lysine, 2.86% methionine, 6.46% threonine and 80,000 IU vitamin E. Lysine is important for bone growth. Methionine reduces the severity of building muscle, muscle breakdown and aids in muscle building. Also encourages healthy skin and connective tissue, which promotes joint and coat health, and strong hoof flexibility. Threonine is key for strength and elasticity.