Xymogen 5-HTP CR supports healthy biosynthesis of serotonin, mood, positive outlook, normal appetite, and a restful sleep pattern. 5-hydroxytryptophan (5-HTP) is a precursor to serotonin and this formula has a delivery system that releases 5-HTP slowly and steadily over a period of time. 5-HTP naturally increases the body's level of serotonin, the chemical messenger that affects emotions, behavior, appetite, and sleep. Recommended Use: Take 1 tablet up to two times daily, with a meal, or as directed by a healthcare professional. Do not exceed recommended dose.