L-Tryptophan is an essential amino acid that is famous for its high levels in turkey. It is used in the biosynthesis of proteins and is found in meats, especially poultry. L-Tryptophan is most famous for its ability to support healthy sleep, but it may also promote a calm mood, aid memory, and help in maintaining healthy weight when taken in conjunction with a healthy diet and exercise.** These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.