BCAABCAA (Branched Chain Amino Acids) Our HQ Nutrition Branched chain amino acids are a group of three essential amino acids: leucine, isoleucine and valine. BCAA supplements are commonly taken in order to boost muscle growth and enhance exercise performance. BCAA (Branched Chain Amino Acids) Benefits: Increases muscle growth Decreases muscle soreness Increases muscle recovery Reduces exercise fatigue Prevents muscle wasting Benefits people with liver