Source Naturals L-Tryptophan 500mg, 120 Tablets

Helps support relaxation, restful sleep, and feeling better
Plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response
Also supports immune functions because it is the body's precursor to the kynurenines that regulate immunity
If needed, l-tryptophan converts to niacin in the body
Extremely pure and is regularly tested to ensure the highest standards of quality Dietary supplement. Mood, relaxation, sleep. The essential amino acid L-tryptophan helps support relaxation, restful sleep, and feeling better. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response. L-Tryptophan also supports immune functions because it is in the body's precursor to the kynurenines that regulate immunity. If More »