About this item Doctor's Best 5-HTP enhanced with Vitamins B6 and C provides a drug-free support for sleep, mood, anxiety and stress 5-HTP aids serotonin production; Serotonin is the chemical neurotransmitter produced in the brain that helps regulate sleep, body temperature, sexual desire, mood and appetite Synthesis of serotonin in the brain requires an adequate supply of either tryptophan or 5-HTP as precursors in the central nervous system Vitamin B6 is necessary for the 5-HTP to be converted into serotonin and Vitamin C helps conversion of 5-HTP to serotonin