NOW Supplements, L-Tryptophan 500 mg, Encourages Positive Mood*, Supports Relaxation*, 60 Veg Capsules

Supports Relaxation Pharmaceutical Grade (USP) Encourages Positive Mood Promotes Restful Sleep Vegetarian Formula L-Tryptophan is an essential amino acid important in human nutrition for the synthesis of melatonin and serotonin, hormones regulating sleep, positive mood and immune function. As an essential amino acid, it is not synthesized by the body and must be obtained from the diet. NOW L-Tryptophan is pharmaceutically pure - every lot is tested to be free of Peak E and microbial contamination.