What is BCCA in whey protein? BCCA stands for Branched Chain Amino Acid. BCCA are a special type of amino acid that helps in protein synthesis and in muscles growth.BCCA has 3 out of 9 essential amino acids and they are - Leucine, Isoleucine, and Valine. BCCA has lower Calories content than Whey protein. If you want to lose some weight while gaining muscles then BCCA is better than whey protein.  You can also use both whey protein and BCCA together for better muscle growth. But nowadays most of the whey protein powder comes with BCCA.  BCCA gets broken down during a workout so you have to get them to your body. In whey protein, you get BCCA and other essential amino acids as well, so it's better to have whey protein.