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.
L-Tryptophan (Free-Form) 1 g (1,000 mg). Cellulose (capsule), cellulose powder and stearic acid (vegetable source).
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