Multi Active Strengthening System (M.A.S.S. Liquid) combines a unique formulation of tested and proven ingredients to supply nutrients to help strengthen horse is muscles and maintain a healthy appetite. High levels of natural rice bran extract (gamma oryzanol) support muscle development and conditioning while essential amino acids provide optimum weight and feed efficiency plus growth. Also contains fenugreek, a natural appetite stimulate. Helps to support the endocrine system s natural production and balance. For all classes of horses. Each oz contains 2,000 mg l-lysine, 1,500 mg gamma oryzanol, 1,000 mg threonine and 20 mg fenugreek.