Natural Factors Melatonin - 3 mg - Bonus Size - Melatonin is the body’s own natural sleep hormone, produced in the brain in the pineal gland each evening when darkness falls. It is part of the “biological clock” that produces the circadian rhythm and prepares the body for sleep. But the natural rhythm of this clock can be disrupted, resulting in difficulty sleeping. Melatonin works with the body’s natural cycles to safely and effectively reset your “biological clock”, helping you fall asleep faster, increasing the quality and duration of sleep, supporting REM sleep, and reducing daytime fatigue. Natural Factors Melatonin, from non-animal sources, comes in a peppermint-flavoured sublingual tablet to ensure fast, consistent absorption.