New study links melatonin to serious health problems

The study found that patients using melatonin for 12 months or more had approximately a 90 per cent higher chance of heart failure over five years.

Nov 7, 2025 - 22:35
New study links melatonin to serious health problems
New study links melatonin to serious health problems
  • A new large-scale study warns that prolonged use of the sleep supplement melatonin could be linked to hospitalisation for heart failure or even death.
  • Researchers analysed five years of health records from over 130,000 adults with insomnia, comparing those who took melatonin for at least a year with non-users.
  • The study found that patients using melatonin for 12 months or more had approximately a 90 per cent higher chance of heart failure over five years.
  • Additionally, melatonin users were 3.5 times more likely to be hospitalised for heart failure compared to individuals who did not take the supplement.
  • Experts advise that over-the-counter melatonin supplements are unregulated and should not be taken chronically without a proper medical indication, despite being widely considered safe.

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