NOW Supplements, L-Tryptophan 1,000 mg, Double Strength, Encourages Positive Mood*, 60 Tablets

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 NOW® L-Tryptophan is tested to be free of peak E and microbial contamination.NOW® Double Strength L-Tryptophan has twice the L-tryptophan (1000 mg per tablet) as in our regular strength product (500 mg per capsule).

ENCOURAGES POSITIVE MOOD*: Critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function.* PROMOTES RESTFUL SLEEP*: Every lot of is tested to be free of peak E and microbial contamination. CLASSIFICATIONS/CERTIFICATIONS: Kosher, Vegan, Non-GMO GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation). Packaged in the USA by a family owned and operated company since 1968.