Amino acids are included in the structure of muscles and cells. There are 20 amino acids of importance in human biochemistry. 8 of them are called essential amino acids.
The individual amino acids are each life essential nutrients, which is essential for body growth, regeneration, including wound healing, immune response and the production of enzymes and hormones.
Supplementation of amino acids is essential for the body, since it can not synthesize them in sufficient amounts.