5-HTP SR has a delivery system that releases 5-HTP slowly and steadily over a period of time. 5-HTP is a drug-free amino acid derived from a plant that naturally increases the body’s level of serotonin, the chemical messenger that affects emotions, behavior, appetite, and sleep. Today’s stress-filled lifestyles and dietary practices may negatively affect how the body handles serotonin. Regularly using 5-HTP SR helps promote a more positive outlook and greater appetite control.*