“Metabolic profiling found … exogenous application of GABA led to increases in accumulations of amino acids (glutamic acid, … acid, alanine, threonine, serine, and valine), organic acids (aconitic acid, malic acid , succinic acid, oxalic acid, and threonic acid), sugars (sucrose, fructose, …, galactose, and maltose), and sugar alcohols (mannitol and myo-inositol).”