A recent study analyzing health records of tens of thousands of adults with chronic insomnia found that those taking prescribed melatonin for over a year had an increased risk of heart failure within five years compared to nonusers, according to the American Heart Association.
The study, which has not undergone peer review, has received mixed responses from sleep medicine specialists and cardiologists. Experts caution against alarm and emphasize the need for further research on long-term melatonin use.
The preliminary findings "appear to contradict existing research suggesting melatonin might have health benefits for people with heart failure."
This research abstract is expected to be presented at the American Heart Association’s Scientific Sessions, a major cardiovascular science and medicine conference.
Despite these findings, health authorities recommend no drastic changes in melatonin use at this time. Reviews and product recommendations are independent, and affiliate commissions may apply to linked purchases.
Author’s summary: Preliminary data suggest potential heart risks linked to prolonged melatonin use, but experts advise caution and further study before drawing conclusions.