Amino Acids are the 'building blocks' of the system. Required for cell formation and tissue repair. They play a disease resistance role in the formation of antibodies, are part of the enzyme and hormonal system and build nucleoproteins (DNA & RNA).

Some amino acids are known as essential and cannot be manufactured by the body, the others being non-essential and can only be formed through proper nutrition.

Protein is made up of amino acids, - any of a group of organic nitrogenous compounds (nitrogen containing) that form the component molecules of proteins.