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the claim

Melatonin shortens the time it takes adults to fall asleep.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
8 sources for · 0 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 shortens the time it takes adults to fall asleep?

Yes. Two peer-reviewed summaries cite the European Food Safety Authority's statement that 1 mg melatonin taken before bed reduces the time to fall asleep, and a Johns Hopkins page says melatonin may help people with insomnia fall asleep slightly faster. Other items cover related sleep outcomes or narrower populations rather than the general adult sleep-onset claim.

Verdict: SUPPORTED · 8 sources for, 0 against · Last checked

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

Evidence for · 8
melatonin
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melatonin. (n.d.). cancer.gov. https://www.cancer.gov/publications/dictionaries/cancer-terms/def/melatonin

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More for · 7
Exogenous Melatonin for Sleep Problems in Individuals with Intellectual Disability: A Meta-Analysis
2009
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Wiebe, B., G., S. M., Robert, D., Hubert, K., M., v. G. I., & G., C. L. M. (2009). Exogenous Melatonin for Sleep Problems in Individuals with Intellectual Disability: A Meta-Analysis. eric.ed.gov. https://doi.org/10.1111/j.1469-8749.2008.03244.x

High dose melatonin increases sleep duration during nighttime and daytime sleep episodes in older adults -
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High dose melatonin increases sleep duration during nighttime and daytime sleep episodes in older adults - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1111/jpi.12801

Fall asleep quickly – wake up refreshed!
2021
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Schuett, T. (2021). Fall asleep quickly – wake up refreshed!. doi.org. https://doi.org/10.52778/efsm.21.0294

Fall asleep quickly – wake up refreshed!
2021
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Schütt, T. (2021). Fall asleep quickly – wake up refreshed!. doi.org. https://doi.org/10.52778/efsm.21.0017

Melatonin for Sleep: Does It Work? | Johns Hopkins Medicine
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Melatonin for Sleep: Does It Work? | Johns Hopkins Medicine. (n.d.). hopkinsmedicine.org. https://www.hopkinsmedicine.org/health/wellness-and-prevention/melatonin-for-sleep-does-it-work

Effect of Melatonin on Sleep, Behavior, and Cognition in ADHD and Chronic Sleep-Onset Insomnia
2007
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B., V. d. H. K., G., S. M., W., V. S. E. J., Richard, R. K., & Boudewijn, G. W. (2007). Effect of Melatonin on Sleep, Behavior, and Cognition in ADHD and Chronic Sleep-Onset Insomnia. eric.ed.gov. https://eric.ed.gov/?id=EJ754852

Efficacy of Cognitive Behavioural Therapy for Insomnia With Adjuvant Melatonin Treatment in Older Adults With Chronic Insomnia: A Randomised Controlled Trial
2026
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Efficacy of Cognitive Behavioural Therapy for Insomnia With Adjuvant Melatonin Treatment in Older Adults With Chronic Insomnia: A Randomised Controlled Trial. (2026). clinicaltrials.gov. https://clinicaltrials.gov/study/NCT07695246

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