Melatonin's Hidden Heart Risk
Scientists have discovered a surprising connection between long-term melatonin use and heart failure in patients with chronic insomnia.
Marketed as "nature's sleep switch," melatonin has become a popular nightly habit for millions. However, new research presented at the American Heart Association's Scientific Sessions 2025 suggests that the supplement may have unintended consequences on the heart.
- Long-term melatonin use (for a year or more) was linked to a nearly doubled risk of developing heart failure.
- It more than tripled the risk of hospitalization for heart failure.
- It nearly doubled the risk of death over five years in a review of over 130,000 adults with insomnia.
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Author's summary: Melatonin may harm the heart in insomnia patients.
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