While supplements aren’t magic pills that will give you immense results, they definitely play a part in helping you recuperate after a tough work out. In this series, we’re going to look at various supplements that are common among gym-goers and bodybuilders. The first one on our list is Branched Chain Amino Acids. BCAAs are three of the essential amino acids present in our body that make up the skeletal muscle. They are called leucine, isoleucine and valine and together comprise 35% of the essential amino acids in muscle proteins and 40% of the amino acids required by mammals.