Zahler, L-Tryptophan, Purified L-Tryptophan, 500 mg, 60 Capsules

Advanced Nutrition by ZahlerHigh Potency Serotonin EnhancerMind & SpiritDietary SupplementFeel Better, Everyday™Kosher ParveThis Product is Manufactured in a GMP Certified FacilityNon-GMOGluten FreeDairy FreeSoy FreeVegetarian Friendly High Potency Serotonin Enhancer L-Tryptophan is used by the brain as a precursor to serotonin and melatonin, neurotransmitters that are necessary for normal sleep. Adequate sleep is crucial for healthy immune and nervous system function. In addition, changes in the level of serotonin in the brain can impact mood and satiety.