Vegan capsules / Neurotransmitter support is the intermediate metabolite between the amino acid L-tryptophan and serotonin. Typically used as a sleep supplement/ Supports positive mood and relaxation. Supports the production of serotonin in the brain and central nervous system; serotonin can impact sleep, mood, appetite, and body temperature.* Dairy-Free, Egg Free, Kosher, Made without Gluten, Non-GMO, Nut Free, Soy Free, Vegan/Vegetarian. GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).