NOW Supplements 5-HTP (5-Hydroxytryptophan) 200mg Plus Tyrosine Capsules, 60 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, appetite, temperature, sexual behaviour, and pain sensation. Serotonin also has a significant role in depression, anxiety, and aggression. 5-HTP is one of the few approved natural therapies for fibromyalgia with the possibility of reducing pain severity, morning stiffness, and sleeplessness. 5-HTP has been shown to increase neurotransmitting catecholamines such as dopamine and norepinephrine that are synthesized from tyrosine. There is speculation that increg the availability of tyrosine to the brain allows increased neurotransmitter synthesis, which helps to counter the negative effects of stress. The addition of B-vitamins to this formula provides additional synergistic effects as they enhance the metabolism of amino acids. 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 Supplememts L-Tryptophan 220mg Capsules, 60 Count L-Tryptophan is a large neutral amino acid essential to human metabolism because it is the metabolic precursor of serotonin (a neurotransmitter), melatonin (a neurohormone), and niacin (vitamin B3) which assist in the regulation of sleep, positive mood and immune function. L-Tryptophan is not synthesized by the body and must be obtained from the diet.

Product 2: L-Tryptophan. Product 2: Vegan/ Vegetarian. Product 2: Source of an essential amino acid for the maintenance of good health. Product 1: With synergistic L-Tyrosine, vitamin B3, and vitamin B6. Product 1: High potency 200 mg 5-HTP (5-Hydroxytryptophan). Product 1: Helps to support healthy mood balance and reduce symptoms of fibromyalgia. Product 1: 5-HTP is an intermediate metabolite between the amino acid L-tryptophan and serotonin.