http://www.vitamingroceruk.blogspot.in/2015/01/about-melatonin-supplements-everything.html - Melatonin is a natural hormone that is secreted in the pineal gland, which plays a major role in our ability to sleep peacefully. Watch the video for more information about the benefits and side effects of Melatonin supplements. Also know about factors to consider while buying Melatonin Supplements.