Melatonin's Hidden Heart Risk
Scientists have discovered a surprising link between long-term melatonin use and heart failure in patients with chronic insomnia.
Marketed as "nature's sleep switch", melatonin has become a nightly habit for millions, but new research suggests it may have negative effects on the heart.
- Long-term melatonin use (for a year or more) is linked with a nearly doubled risk of developing heart failure.
- It more than triples the risk of hospitalization for heart failure.
- It nearly doubles the risk of death over five years.
These findings are based on a review of more than 130,000 adults with insomnia, presented at the American Heart Association's Scientific Sessions 2025.
the supplement may do more than quiet the mind — it could also trouble the heart
Author's summary: Melatonin may harm heart health in insomnia patients.