Natural Factors Quick Release Melatonin Plus Timed Release - 10 mg - Many adults experience frequent or occasional sleep disturbances, including difficulty falling asleep, staying asleep, or waking up too early. The most popular natural health product taken for sleep is melatonin because it is effective and non-habit forming. Melatonin works with the body’s natural cycles to effectively reset your “biological clock” to help you fall asleep faster, increase the quality and duration of sleep, support REM sleep, and reduce daytime fatigue. Natural Factors Melatonin comes in innovative bilayer tablets. It complements a healthy sleep-wake cycle by releasing 5 mg immediately upon use and an additional 5 mg gradually over several hours.