BCAAs vs. Whey protein Supplements can be quite helpful in reaching your health objectives and improving your level of fitness. Branched-Chain Amino Acids (BCAAs) and whey protein are two of the most widely used options among the many that are available. Which one is best for you? They are both renowned for their abilities to help with muscle growth and recuperation. To assist you in making a wise choice, let’s examine each in more detail.