How to use whey and casein protein powders. Whey protein powder is extremely versatile: It mixes beautifully with water or milk, but also pairs well with oats, Greek yogurt, peanut butter, or your favorite protein shake. If you like baking, try one of the many whey-protein-powered recipes in our Healthy Recipe Database.
Branched-chain amino acids (which are the essential amino acids valine, isoleucine, and leucine) stimulate muscle protein synthesis, potentially more than a normal protein on its own. Protein synthesis is the metabolic process when your body makes new muscle protein, also known as gains.