Naturlider 5-HTP Lider is a food supplement in capsule form containing 5-Hydroxytryptophan (5-HTP). 5-HTP is an amino acid naturally found in the body and used to produce serotonin, a neurotransmitter that helps regulate mood, sleep, and appetite. This product is used to support mood improvement, reduce anxiety, and promote restful sleep. Ingredients The main active ingredient of Naturlider 5-Htp Lider 60 Capsules is 5-Hydroxytryptophan (5-HTP).