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the claim

Melatonin supplements increase the risk of heart attack.

the verdict
INSUFFICIENT LEANING
Recorded sources
0 sources for · 2 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that melatonin supplements increase the risk of heart attack?

Unclear. Two sources partially address the claim: a 2025 dose-response meta-analysis of 63 RCTs reports melatonin supplementation significantly reduced systolic blood pressure and other cardiometabolic risk factors, and a Cleveland Clinic page reports possible links between melatonin and reduced blood pressure and cholesterol. Neither directly measures heart attack outcomes, so the evidence only partially bears on the claim and points away from increased risk.

Verdict: PARTIAL LEAN · 0 sources for, 2 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence against · 2
Comprehensive Effects of Melatonin Supplementation on Cardiometabolic Risk Factors: A Systematic Review and Dose–Response Meta-Analysis
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Comprehensive Effects of Melatonin Supplementation on Cardiometabolic Risk Factors: A Systematic Review and Dose–Response Meta-Analysis. (n.d.). cir.nii.ac.jp. https://doi.org/10.3390/nu18010134

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More against · 1
How Melatonin Impacts Heart Health
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How Melatonin Impacts Heart Health. (n.d.). health.clevelandclinic.org. https://health.clevelandclinic.org/how-melatonin-impacts-heart-health

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