Monosodium glutamate (MSG) is the sodium salt of the non-essential amino acid glutamic acid. Glutamic acid is one of the most abundant amino acids in human foods. When glutamate is present in a free form, not as a component of proteins or peptides, it has a flavour-enhancing effect and for this reason it is added to foods as its purified monosodium salt.
Monosodium Glutamate (MSG) - Information sheet
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