Natrol 5-HTP Description: Promotes Positive Mood Helps Control Appetite Naturally Drug Free Natrol 5-HTP is a drug-free plant extract and amino acid that helps increase your body’s own serotonin levels which play a key role in controlling appetite and enhancing mood. The end result: the positive attitude needed to help you maintain a positive, healthy outlook and keep your diet goals. Free Of Yeast, wheat, corn, milk, egg, soy, glutens, artificial colors and flavors, added sugar, starch and preservatives. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.