Essential amino acids cannot be made by the body. As a result, they must come from food. The 9 essential amino acids are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. Our T60 vegan protein contains all of the 9 essential amino acids in high proportions, making this powder a perfect source of protein for your body.