Quicksilver Scientific Liposomal GABA with L-theanine, 50 mlQuicksilver Scientific Liposomal GABA and L theanine (rest support), 50 ml Liposomal GABA with L theanine helps balance the nervous system, promotes good mood and the liposomal form guarantees excellent absorbability. GABA (gamma aminobutyric acid) is a derivative of an amino acid produced in the human body that acts as a neurotransmitter in the central nervous system. Neurotransmitters are chemical messengers that transmit messages between cells.