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the claim

Clinical evidence that valerian root improves sleep quality is inconclusive according to systematic reviews.

the verdict
CONTESTED PARTIAL
Recorded sources
2 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 clinical evidence that valerian root improves sleep quality is inconclusive according to systematic reviews?

Partly. One source states that systematic reviews have found inconsistent and inconclusive results about valerian's effects on sleep, and a reference work notes effectiveness is described as inconclusive. However, a systematic review and meta-analysis concludes valerian could be safe and effective for sleep, and another review says the evidence suggests it might improve sleep quality.

Verdict: CONTESTED PARTIAL · 2 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 for · 2
Valerian (herb)
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Valerian (herb). (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Valerian_(herb)

Evidence against · 2
Valerian Root in Treating Sleep Problems and Associated Disorders—A Systematic Review and Meta-Analysis
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Valerian Root in Treating Sleep Problems and Associated Disorders—A Systematic Review and Meta-Analysis. (n.d.). cir.nii.ac.jp. https://doi.org/10.1177/2515690x20967323

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More for · 1
A Televised, Web-Based Randomised Trial of an Herbal Remedy (Valerian) for Insomnia
2007
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Oxman, A. D., Flottorp, S., Håvelsrud, K., Fretheim, A., Odgaard-Jensen, J., & Austvoll-Dahlgren, A. (2007). A Televised, Web-Based Randomised Trial of an Herbal Remedy (Valerian) for Insomnia. doi.org. https://doi.org/10.1371/journal.pone.0001040

More against · 1
Valerian for Sleep: A Systematic Review and Meta-Analysis -
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Valerian for Sleep: A Systematic Review and Meta-Analysis - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1016/j.amjmed.2006.02.026

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