Taking melatonin long-term may indicate underlying heart issues rather than causing them, according to a study that found regular users were nearly twice as likely to develop heart failure. The research analyzed health records of over 130,000 adults, revealing a 4.6% heart failure rate among melatonin users compared to 2.7% in non-users. Experts suggest that chronic melatonin use warrants discussion with healthcare providers, emphasizing the need for further investigation into the supplement’s potential risks. Melatonin is widely used, with about 27% of U.S. adults reportedly taking it.
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