Natrol� 5-HTP TR 100mg Time Release is a drug-free plant-derived source of an amino acid that naturally increases the body's level of serotonin the chemical messenger that affects emotions behavior appetite thought and sleep. Regular use of Natrol 5-HTP helps provide a more positive outlook promotes relaxation calm and greater appetite control. Natrol 5-HTP TR is 100% vegetarian and has a controlled delivery system that releases 5-HTP slowly and then steadily over a period of 12 hours.Other products from HerbsPro