NOW Supplements GABA (Gamma-Aminobutyric Acid) 500mg Plus Vitamin B-6 Capsules, 200 Count GABA (Gamma-Aminobutyric Acid) is a non-protein amino acid that functions as a neurotransmitter in the human brain. GABA is naturally produced in the body and its presence within the central nervous system may help promote relaxation and ease nervous tension. NOW provides only the naturally occurring L-form of GABA as found in food, as well as in the body. Our NOW natural and organic Supplements are an effective way to ensure you and your loved ones are getting essential vitamins, minerals and nutrients for daily optimal health. Since 1968, NOW has been making top quality products that are tested to the highest standards to empower people to lead healthier lives. Our promise - what is on the label, is precisely what is in the bottle. NOW Supplements 5-HTP (5-Hydroxytryptophan) 100mg Capsules, 120 Count 5-HTP, the intermediate metabolite between the amino acid L-tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia). 5-HTP readily crosses the blood-brain barrier and increases central nervous system (CNS) synthesis of serotonin. Serotonin can affect sleep, and many other important biological functions. This is a mid-range dosage of 5-HTP. Our NOW natural and organic Supplements are an effective way to ensure you and your loved ones are getting essential vitamins, minerals and nutrients for daily optimal health. Since 1968, NOW has been making top quality products that are tested to the highest standards to empower people to lead healthier lives. Our promise - what is on the label, is precisely what is in the bottle.Product 2: 5-HTP readily crosses the blood-brain barrier and increases central nervous system (CNS) synthesis of serotonin. Serotonin can affect sleep, and many other important biological functions. Product 2: 5-HTP, the intermediate metabolite between the amino acid L-tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia). Product 2: Reduces the severity and duration of migraine headaches when taken as a prophylactic. Product 2: 5-HTP are natural amino acids which helps to relieve symptoms of fibromyalgia. Product 1: NOW provides only the naturally occurring L-form of GABA as found in food, as well as in the body. Product 1: GABA is naturally produced in the body and its presence within the central nervous system may help promote relaxation and ease nervous tension. Product 1: GABA (Gamma-Aminobutyric Acid) is a non-protein amino acid that functions as a neurotransmitter in the human brain. Product 1: A natural non-protein amino acid which helps to temporarily promote relaxation and maintenance of good health.