Essential amino acids cannot be synthesized in the body, and therefore must be supplied through diet. The nine essential amino acids are: phenylalanine, valine, threonine, tryptophan, methionine, leucine, isoleucine, lysine, and histidine. If these essential amino acids are deficient, the body's organs and systems can be adversely affected, including the brain’s cognitive function and the immune system. Pure Protein is loaded with amino acids that support the body's ability to instantly absorb protein in the form of a convenient meal replacement drink. In addition to its nutritive qualities, Pure Protein also supports the body in managing weight, building muscle and healthy digestive function.