Dymatize Elite Casein helps keep your muscles supplied with a steady stream of amino acids, the building blocks of muscle. This helps avoid the catabolic state of muscle protein breakdown that begins to happen when your muscles are deprived of the right nutrients. Casein is a unique protein derived from milk that breaks down slowly in your digestive system, keeping you fuller longer and providing a sustained release of muscle-building amino acids. This makes casein the ideal choice anytime your body goes without protein for an extended period, especially just before bedtime. Dymatize Elite Casein delivers 25 grams of sustained-release protein, with over 10 grams of critical branched chain amino acids (BCAAs) and glutamine precursors per serving.