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

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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.

Source: https://www.sciencedaily.com/releases/2 ... 035228.htm