Melatonin is a potent free radical scavenger naturally produced in the pineal gland and present in high amounts in the gastrointestinal tract. It is involved in many of the body, brain and glandular biological functions including regulation of normal sleep/wake cycles, regulation of the immune system and maintenance of a healthy gastrointestinal lining. Other Ingredients: Rice Flour and Hypromellose (cellulose capsule). Not manufactured with wheat, gluten, soy, corn, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens. Caution: For adults only at bedtime. Not for pregnant or nursing women. May cause drowsiness. Do not use in conjunction with alcoholic beverages, when driving a vehicle, or while operating machinery. Consult physician if taking medication (especially sedatives and anti-depressants) or have a medical condition (including depression, high blood pressure and epilepsy). Keep out of reach of children.