Doctor's Best L-Tryptophan with TryptoPure an essential amino acid that promotes normal, restful sleep and healthy mood & behavior*Contains L-tryptophan from TryptoPure, a highly purified, pharmaceutical-grade L-tryptophan*L-tryptophan is a biochemical precursor for serotonin, which is the main source of the body?s major sleep hormone melatonin*
$16.79
