Ancient Minerals Magnesium Good Night with Melatonin is a smooth, quickly absorbed emulsion of magnesium chloride and melatonin in a skin-nourishing base of certified organic oils. Melatonin helps you sleep better when applied before sleep. Magnesium, an essential element of the human body, helps prevent various health conditions caused by the deficiency of magnesium, including cardiovascular disease, hypertension, diabetes mellitus, and headaches. Furthermore, magnesium also assists in energy production, DNA transcription and protein synthesis. Magnesium can also aid in bone growth and may play a role in athletic performance. It regulates the body’s use of calcium and other minerals. Ancient Minerals Magnesium Good Night with Melatonin Lotion is fragrance free and does not contain any formaldehyde releasing preservatives.