L-Tryptophan 1,000 mg with Bioperine® and B vitamins L-Tryptophan is an essential amino acid and a precursor for the synthesis of serotonin. Tryptophan crosses the blood-brain barrier and is converted to L-5-Hydroxytryptophan (5-HTP), which in turn is converted into serotonin. Serotonin is an important neurotransmitter necessary for the regulation of appetite, mood, and melatonin production.*

Warning: Not to be taken by pregnant or lactating women. If you have any health condition or are taking any medication, particularly psychiatric and antidepressant medication, consult your professional before use. Keep out of the reach of children. Store in a cool, dry place. Use only if safety seal is intact.