<<Disclaimer: Verify this information before applying it to your situation.>> Glutamic acid hydrochloride is one form of glutamic acid, one of the non essential amino acids. This is just a single amino acid, not a protein (which is a chain of many amino acids). Jenny Herl | "The world has enough for everyone's need, [log in to unmask] | but not enough for everyone's greed." University of Illinois | Urbana-Champaign | --attributed to Mahatma Ghandi (1869-1948)