Full Breakdown
Long-Term Melatonin Use Linked to Increased Heart Risks: A Closer Look
11/7/2025, 2:49:10 AM
Overview of the Research Findings
Recent research presented by the American Heart Association has raised concerns regarding the long-term use of melatonin supplements, particularly their potential association with increased risks of heart failure and mortality. The study analyzed electronic health records from over 130,000 adults diagnosed with insomnia, revealing that those who used melatonin for at least a year exhibited a significantly higher likelihood of developing heart failure, being hospitalized for heart-related issues, and dying from any cause compared to non-users.
Key Statistics from the Study
The findings indicated that approximately 4.6% of long-term melatonin users developed heart failure, compared to 2.7% of non-users. Hospitalization rates for heart failure were notably higher among melatonin users, with 19% experiencing hospitalizations versus 6.6% in the control group. Additionally, the mortality rate was 7.8% for long-term users compared to 4.3% for non-users. These statistics suggest a concerning trend, although the overall risk for individuals remains relatively low.
Expert Perspectives on Melatonin Use
Experts in sleep medicine, including Dr. Raj Dasgupta, emphasize that while the study indicates an association, it does not establish causality. Dr. Dasgupta noted that chronic sleep deprivation itself is linked to heart issues, suggesting that melatonin may not be the root cause of the observed health problems. Instead, he advocates for addressing underlying conditions that contribute to insomnia, such as sleep apnea or untreated heart disease.
Dr. Ekenedilichukwu Nnadi, the lead author of the study, highlighted the need for further research to clarify whether the risks are directly related to melatonin or to the health conditions of those using it. He stated, “Melatonin supplements may not be as harmless as commonly assumed,” urging caution among users.
Criticism and Counterarguments
Despite the alarming findings, some experts, including NHS surgeon Dr. Karan Rajan, argue that the link between melatonin and heart risks may be overstated. Dr. Rajan pointed out that individuals with undiagnosed heart issues or severe insomnia may be more likely to use melatonin, suggesting that the supplement itself may not be the cause of increased health risks. He cautioned against high doses of melatonin, recommending a maximum of 0.3 milligrams per day, which aligns with the body’s natural production levels.
Official Statements and Recommendations
The American Academy of Sleep Medicine and other health professionals recommend that individuals considering long-term melatonin use consult with a healthcare provider. They stress the importance of evaluating the underlying causes of sleep disturbances rather than relying solely on supplements.
Conclusion and Future Directions
While melatonin remains a popular over-the-counter sleep aid, the recent findings underscore the necessity for further investigation into its long-term safety, particularly concerning cardiovascular health. Health professionals advise users to prioritize sleep hygiene and seek medical guidance for persistent sleep issues rather than depending on melatonin as a long-term solution. As research continues, it is crucial for users to remain informed and cautious about their supplement use.
