Amino acids are the cornerstone of proteins and perform many important tasks and functions in the human body. They are divided into essential and nonessential. Essential amino acids cannot be produced by the body itself, but enter the body via food consumption. If our diet lacks one of these amino acids, or they are only available in insufficient quantities, the organism cannot build muscle mass. They have a key role in protein synthesis and regeneration. Each amino acid, even the nonessential kind, has a certain task in the body, so it is important that they be added to the diet if we want to achieve our goals.