You likely already know it as one of the three major macro nutrients that make up your diet (the other two being fat and carbohydrates). Protein is considered the building block of life and is found in every cell of the body. Protein is made up of amino acids that are attached to one another in long chains. There are 20 different kinds of amino acids, and the sequence in which the different amino acids are arranged helps determine the role of that particular protein. ~ Berceste