Serene Science Calm Mind Dietary SupplementGABA 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.