Physical Wellness · ScienceDaily Nutrition · August 29, 2026

Long-term melatonin use linked to 90% higher heart failure risk

People with chronic insomnia who used melatonin long term had a roughly 90% higher risk of developing heart failure over five years, according to a large preliminary study. The findings do not prove melatonin causes heart problems, but they raise new questions about the safety of taking the popular sleep supplement for extended periods.

Originally published by ScienceDaily Nutrition. We curate and add context; they did the reporting.

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