Definitions for "Essential amino acids"
Amino acids that cannot be synthesized in the body in adequate amounts and must be obtained from the diet.
Amino acids that cannot be synthesized in sufficient quantities by the body and therefore must be provided in the diet
A group of amino acids that must be obtained through diet because they are not made in sufficient quantities or at all by our bodies. They are generally considered to include: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine, although cysteine and tyrosine often help meet some of these needs.