Now Foods, L-Tryptophan, 1000 mg, 60 TabsProduct Description Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet.* 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 L Tryptophan is tested to be free of peak E and microbial contamination. Natural color variation may occur in this product. Product
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