Melatonin plays a crucial role in regulating the sleep-wake cycle and is most commonly used to improve sleep quality by reducing the time it takes to fall asleep, increasing total sleep duration, and supporting sleep efficiency. It can also support a healthy response to the effects of jet lag and shift work by helping the body adjust its internal clock to fall asleep despite sleep disturbances. Melatonin Liquid contains a potent dose of the highest-purity melatonin available without any other unnecessary ingredients.