Gamma Amino-Butyric Acid ( GABA), a free amino acid that functions as an inhibitory neurotransmitter, accumulates mainly in rice embryos. GABA has multiple physiological functions, such as normalizing blood pressure and aiding recover from disorders of the autonomic nervous system. γ-氨基丁酸(GABA)是一种神经抑制性递质的游离氨基酸,主要在稻米的胚部表达,具有平和血压和镇定神经等多种生理功能。