Melatonin is a substance secreted by the pineal gland of human brain, which can regulate the speed of sleep and awakening and is a lucky star for insomnia. With the increase of age, the secretion of melatonin decreases, which affects people's normal sleep. This product is a health food with melatonin as the effective component. Functional tests have proved that it has obvious health care function of improving sleep and is used to replace sleeping pills with great side effects. Melatonin can also enhance and maintain the functions of human immune and defense systems. It suits you very well. I wish you get rid of insomnia as soon as possible.