NOW Foods L-Tryptophan 500 mg 120 Veg Capsules, Mood, Sleep and Relaxation

Every lot tested to be free of Peak E and microbial contamination. L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet. Every lot of NOW L-Tryptophan is tested to be free of Peak E and microbial contamination.

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