nature's sunshine gaba plus 60 capsules nature's sunshine gaba plus provides gaba (gamma-aminobutyric acid), an amino acid that plays a role in neurotransmitter and brain activity. this unique formula also includes glutamine and taurine, amino acids that play roles in brain function; spirulina for its abundance of nutrients; and passionflower, an herb long used to help maintain balance in this system and relieve stress. take 1 2 capsules with a meal twice daily. this product is safe for use by adults and children when taken as recommended. consult your health care practitioner before using if you are pregnant, nursing or suffer from any medical condition, or are taking any prescription drug.