The ultimate value of a food protein or a protein supplement is in its amino acid composition. Amino acids are the building blocks of protein, and muscle tissue. Many physiological processes relating to bodybuilding from energy, recovery, muscle hypertrophy, fat loss, and strength gains are linked to amino acids.
The twenty-three amino acids are the molecular building blocks of protein. The amino acids can be divided into two groups: essential amino acids and non-essential amino acids. The nine essential amino acids are so designated because they must be supplied by the foods we eat. The twelve non-essential amino acids are so designated based on the body's ability to synthesize them from other amino acids.