Product:L-Tryptophan Molecular Forluma,C11H12 N2O2 CAS No:73-22-3 Characteristics:White crystals or crystalline powder. L-TryptophanChemical ... serotonin, hormones involved with mood and stress response. L-Tryptophan also supports immune functions because it is the body ... to the kynurenines that regulate immunity. If needed, L-tryptophan converts to niacin in the body, which supports circulation ...