SOURCE NATURALS - L-Leucine 500 mg - 240 CapsulesDESCRIPTION L Leucine is an essential amino acid, specifically classified as a "branched chain amino acid" (BCAA). BCAAs, especially leucine, stimulate muscle protein synthesis and may be the major fuel involved in anabolic reactions. This makes them especially important for body builders and other athletes in sports that demand explosive strength. DETAILS Package Description: 240 Capsules Serving Size: 3 Capsules Number of Servings: 80 FACTS Serving