NOW Supplements, Melatonin 5 mg, Free Radical Scavenger*, Healthy Sleep Cycle*, FREE RADICAL SCAVENGER*: Melatonin is a potent free radical scavenger naturally produced in the pineal gland and present in high amounts in the gastrointestinal tract.* GASTROINTESTINAL SUPPORT*: It is involved in many of the body, brain and glandular biological functions including maintenance of a healthy gastrointestinal lining.* HEALTHY SLEEP CYCLE*: It is involved in many biological functions including regulation of normal sleep/wake cycles and the regulation of the immune system. GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation) Packaged in the USA by a family owned and operated company since 1968 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.* Payment DetailsWe currently accept payment via PayPal only. Once payment is cleared, we will dispatch your shipment within 1-3 business days. Please refer to the "Shipping" tab for more information regarding shipping speed to your destination.Return PolicyAs our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected. If you are not satisfied with your purchase, please contact us within 30 days of receiving your order to process a return.