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Serene ScienceCalm MindDietary SupplementSerene Science® GABA CALM® combines two of the main inhibitory neurotransmitters GABA and glycine with N-acetyl L-tyrosine which is a precursor to the neurotransmitters dopamine and norepinephrine. In addition taurine supports the calming effects of GABA. The lozenge form dissolves in the mouth for quick and convenient delivery.