A new study found that long-term melatonin use may increase the risk of heart failure in adults with chronic insomnia. The research suggests that people taking melatonin for over a year are more likely to be hospitalized for heart failure and die from any cause compared to those who don’t take the supplement. While the study only shows an association, many readers have expressed skepticism about its validity, citing the need for more evidence to confirm the link between melatonin use and heart failure.
Source: https://www.washingtonpost.com/health/2025/11/03/melatonin-heart-failure-sleep-aid