Now Foods L-Tryptophan 1000mg Double Strength 60 tabs

Supports relaxationHigher gradePromotes positive moodPromotes 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 essential for the production of serotonin and melatonin, which help maintain a positive mood, healthy sleep patterns and proper immune system function. Each batch of NOW L-Tryptophan is tested to be free of Pico E and microbial contamination.