Source Naturals l-Tryptophan 500 mg 30 tablets

Dietary supplement
Mood, Relaxation, Sleep
The essential amino acid L-tryptophan promotes relaxation, calm sleep, and a positive mood. It plays a role in the synthesis of melatonin and serotonin – hormones responsible for mood and stress response, as well as sleep/wake cycles. L-tryptophan also supports immune functions as it is a precursor to kynurenines that regulate immunity. When needed, L-tryptophan is converted in the body to niacin, which supports circulation, a healthy nervous system, food metabolism, and the production of hydrochloric acid for the digestive system.