Melatonin supplements are available in the form of capsules, tablets, or liquid, and they are often used as a natural sleep aid.
Melatonin supplements are thought to work by helping to restore the body's natural rhythm of melatonin production, which can be disrupted by things like jet lag, shift work, and exposure to artificial light. Some people find that taking a melatonin supplement can help them fall asleep faster and wake up less frequently during the night.