NOW Supplements L-Tryptophan 500 mg. Supplement, Positive Mood and Relaxation (120 ct.)

HIGHLIGHTS: L-Tryptophan is an essential amino acid that is not synthesized by the body and must be obtained by diet or supplementation Critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function* Every lot is tested to be free of Peak E and microbial contamination 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). PRODUCT DETAILS:What is L-Tryptophan?L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet. L-Tryptophan is critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function.* Every lot of NOW L-Tryptophan is tested to be free of Peak E and microbial contamination. Manufacturing Testing