Bodybuilders and strength trainers have known about the benefits of BCAA for years, and there is more and more research being published in relation to their effect on increasing protein synthesis and reducing muscle breakdown. Our Branched Chain Amino Acid Tablets 1000 mg deliver the optimal 2:1:1 ratio of Leucine, Isoleucine and Valine. BULK POWDERS Branch Chain Amino Acids comprise of Leucine, Isoleucine and Valine in a 2:1:1 ratio. These three amino acids comprise 1/3 of the protein within our muscles, so are clearly important for building muscle and preventing muscle loss. Branch Chain Amino Acids are considered essential in that they are not produced by the body and so must be obtained through our diet. If they are not present in our diet, we would be unable to survive.