Monosodium glutamate (MSG) is a salt originally derived from herb and commonly marketed as a flavour enhancer. 1 It becomes extensively used in canned food, frozen entrees, crackers, processed meats and dietary supplements. It is also found in soaps, cosmetics, infant formula and vaccines. 2 MSG dissociates in solution to glutamate and sodium ions. 1 Glutamate is the foremost excitatory neurotransmitter in the body.Numerous transporters and receptors for glutamate are found in the