Now Foods L-Tryptophan 500 mg 60 Vcaps
L-Tryptophan is an essential amino acid important in human nutrition for the synthesis of melatonin and serotonin, hormones regulating sleep, positive mood and immune function.*  As an essential amino acid, it is not synthesized by the body and must be obtained from the diet.  NOW® L-Tryptophan is pharmaceutically pure - every lot is tested to be free of Peak E and microbial contamination.
We Also Recommend