Amino acids are the smallest building blocks of proteins and there are 20 or so needed for man to function in everyday life and during exercise. Protein is the building of our muscles and when we eat protein breaks down into amino acids. We need all 20 amino acids, but the body has very different needs of different amino acids depending on how your diet looks like. Eleven of these amino acids are non-essential, meaning the body can produce them with the right amount of nutrients. The remaining nine amino acids are essential, which means that we must have in us these through food, drink or health supplements. Muscles contains up to 40% of the total body protein in adults. It is important to point out that muscle mass not only promotes physical activity but is important because it regulates the amount of amino acids into the blood.
Branched chain amino acids or BCAAs (Branched-Chain Amino Acids) constitutes around 30% of skeletal muscle protein consists of: leucine, and valine isoluecin. These three amino acids have been shown to have a positive effect on muscle building.