Melatonin is often seen as a safe, natural sleep aid—but what if long-term use carries hidden risks? A new preliminary study presented at the American Heart Association’s Scientific Sessions 2025 has raised eyebrows in the medical community. Researchers analyzed health records from over 130,000 adults with chronic insomnia and found that those who used melatonin for more than a year had a 90% higher risk of developing heart failure, were 3.5 times more likely to be hospitalized, and faced nearly
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