The bigger picture of branched chain amino acids (bcaas) l-leucine, l-isoleucine, and l-valine are commonly grouped together and referred to as branched chain amino acids, or bcaas, because of their unique branched chemical structure. Bcaas are essential, meaning that they must be consumed through the diet, since the human body cannot make them from other compounds. Bcaas provide active adults with versatile for training endurance and recovery. Used with protein powders and/or protein-rich foods, these 1g capsules help muscle recovery and protein synthesis. . Optimum nutrition mega-size bcaa 1000 caps - 400 capsules (200 servings)