Melatonin by Nutricost uses only high quality melatonin. Each bottle contains 240 capsules of 10mg melatonin. This product is non-GMO, gluten free, and soy free. Each capsule is one serving. Do not exceed recommended serving. Nutricost, located and headquartered in the USA, only uses the best ingredients for maximum quality and to help you feel your best! By keeping our supplement recipes simple and clean, you get the best experience possible with Nutricost. Our supplements are manufactured in a GMP-compliant and FDA-registered facility; and each batch of every product is tested by independent, ISO-accredited laboratories.