gamma-Glutamylmethylamide
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gamma-Glutamylmethylamide, also known as GMA, N-methyl-L-glutamine, and metheanine, is an amino acid found in green tea,[1] which is structurally related to L-theanine and L-glutamine.
GMA has been shown to be an effective hypotensive, more so than L-theanine.[1]