The Weil Sleep Support Formula helps your body relax while promoting a deep, restful sleep. It contains 3 mg of melatonin. A clinical study has shown that 3 mg of melatonin can help improve overnight sleep efficiency. The formula also contains 5-HTP, which can be converted by the body into serotonin, a neurotransmitter that supports better sleep quality; resulting in a more relaxed feeling; and Lemon Balm and Valerian Root, herbs traditionally used to help promote relaxed sleep and a refreshed state of mind.