Premium Grade Encourages Positive Mood Promotes Restful Sleep* 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. This product is sold by weight not volume.

NOW Foods L-Tryptophan Powder – 2 oz.

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NOW Foods L-Tryptophan Powder – 2 oz.

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