05/10/2026
Melatonin isn't as harmless as you think.
Melatonin is one of the most popular sleep supplements in the world, but new research says we need to talk.
A study of over 130,000 adults with chronic insomnia, presented at the American Heart Association's 2025 Scientific Sessions, found that those who took melatonin for a year or more had:
↳ 90% higher risk of heart failure
↳ 3× more likely to be hospitalized for heart failure
↳ 2× higher risk of death from any cause
This study doesn't prove cause and effect, and more research is needed. But here's what IS clear:
✔ Melatonin is a hormone, not just a supplement
✔ It was never intended for nightly, long-term use
✔ Most OTC doses are far higher than your body naturally produces
✔ Labels are often inaccurate — one study found doses ranging from 74% to 347% of what's listed
If you're struggling with sleep regularly, that's a sign to see your doctor, not to keep stacking supplements. There are evidence-based options that are far safer long-term.
Save this and share with someone who takes melatonin every night.
