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Melatonin supplements have grown in popularity for promoting higher-quality sleep.

Melatonin is a naturally produced hormone in the body that helps regulate sleep, increasing during hours of darkness and decreasing with exposure to daylight. Supplements have become widely available for over-the-counter use, particularly in the U.S.

But new research has linked long-term melatonin use with a significantly increased risk of heart failure, hospitalization and death.

THREE COMMON FRUITS CAN HELP AMERICANS FALL ASLEEP FASTER AND SLEEP BETTER

An observational study from the American Heart Association (AHA) examined five years of health records of 130,828 adults with insomnia, half of whom used melatonin for at least one year. The other half did not

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