Dietary Supplement. Helps maintain mental and emotional well-being. Science-based nutrition. 5-HTP (5-hydroxy L-tryptophan) is a naturally occurring metabolite of the amino acid tryptophan. 5-HTP is converted in the brain to serotonin, a neurotransmitter substance found at the junctions (synapses) between neurons. 5-HTP helps maintain mental and emotional well-being and promotes healthy sleep. Doctor's Best 5-HTP is extracted from the seeds of the Griffonia simplicifolia plant. www.drbvitamins.com. Best 5-HTP is tested to ensure that it does not contain Peak X. Suitable for vegetarians. Contains nothing other than listed ingredients. (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.)