Enhances serotonin synthesis to support emotional well-being and restful sleep.The essential amino acid l-tryptophan is a serotonin precursor. Niacinamide and vitamin B6 provide enhanced support as important cofactors involved in the metabolism of l-tryptophan.L-Tryptophan may also help promote relaxation and lessen occasional cravings.Benefits:Supports emotional well-being and restful sleepPromotes healthy sleep quality, onset and durationMade with hypoallergenic, vegan ingredientsSUGGESTED USAGEPure Encapsulations recommends 2-6 capsules daily, in divided doses, between meals.INGREDIENTSEach vegetable capsule contains:niacin (as niacinamide)5 mg.Tryptopure™ l-tryptophan500 mg.pyridoxal 5'phosphate (activated B6)5 mg.other ingredients: vegetarian capsule (cellulose, water)WARNINGSl-Tryptophan can cause gastrointestinal (GI) side effects, including heartburn, belching and flatulence, nausea, vomiting or diarrhea. It has also been related to headache, dry mouth, visual blurring, ataxia, drowsiness and anorexia. Consult your physician for more information.Tryptophan is contra-indicated with serotonergic medications, including SSRI and MAO inhibitor medications. It is also contra-indicated with sedative and antipsychotic medications. Consult your physician for more information.