A recent study analyzing health records of tens of thousands of adults with chronic insomnia found that those who took prescribed melatonin for over a year had an increased risk of heart failure over five years compared to nonusers, according to the American Heart Association.
Sleep medicine experts and cardiologists have responded cautiously, emphasizing that the study has not yet undergone peer review. They urge the public not to overreact and stress the need for further research on long-term melatonin use.
The American Heart Association stated, "The study’s preliminary results appear to contradict existing research suggesting that melatonin might have health benefits for people with heart failure."
This research abstract will be presented at the American Heart Association’s Scientific Sessions, a conference focused on cardiovascular science and medicine.
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Author's summary: Early findings suggest a link between prolonged melatonin use and heart failure risk, but experts stress caution and call for more studies before drawing conclusions.