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