Nature's Essentials Melatonin utilizes both bi-layer and advanced Cyclosome delivery technology. The two-stage bi-layer melatonin promotes natural restful sleep in immediate and sustained release. The Cyclosome Melatonin is much more easily absorbed and may help your body to balance your sleep and wake cycles (called circadian rhythm) and may onset jet lag, trouble sleeping, night shifts disturbing sleeping patterns, or aid anyone who is just wanting to relax and maximize deep sleep called rapid eye movement (REM) sleep. Incorporate Natures Essentials Melatonin into your supplement regimen to get the sleep you need so you can wake up and move mountains!