Amino acids are the building blocks of proteins in our body and have a major role in the body's functions. The main amino acids are 20, and they are divided into replaceable (which the body can reproduce) and essential (essential, the body cannot produce them). The essential amino acids are: leucine , isoleucine , tryptophan, threonine, methionine, lysine, valine and phenylalvinine. Leucine, isoleucine and valine are branched chain amino acids, extremely common among athletes as BCAA . Amino acids are contained in a very large part of foods, but in small quantities, and for this reason food supplements with amino acids are very common - BCAA , Glutamine , 5-HTP , GABA , Arginine and many others, which you can find in our online store with guaranteed quality from manufacturers such as Biovea , Now Foods and others.