Melatonin supplements are often used to treat

• A. jet lag.
• B. alcohol withdrawal.
• C. night terrors.
• D. Korsakoff's syndrome.

Answer: (A)

Verified step by step guidance

1. Identify the primary function of melatonin in the human body, which is to regulate sleep-wake cycles and circadian rhythms.
2. Understand the condition of jet lag, which occurs when there is a disruption in the body's internal clock due to rapid travel across time zones.
3. Consider how melatonin supplements can help realign the body's internal clock with the new time zone, thus alleviating symptoms of jet lag.
4. Review the other conditions listed: alcohol withdrawal, night terrors, and Korsakoff's syndrome, and note that these are not primarily related to circadian rhythm disruptions.
5. Conclude that melatonin supplements are most commonly used to treat jet lag due to their role in adjusting sleep-wake cycles.