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Research Brief

Ashwagandha sleep studies show a signal with safety caveats

A meta-analysis of five randomized trials found a small but significant sleep improvement signal for ashwagandha extract, with stronger effects in insomnia subgroups and at longer duration or higher dose.

Sleep SupportAshwagandhaSystematic review and meta-analysis
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What the study looked at

Topic
Sleep Support
Ingredient
Ashwagandha
Study type
Systematic review and meta-analysis
Published
2021

What it may mean

Ashwagandha can be considered in stress-related sleep paths, but it should not be treated like a simple sleep vitamin.

What it does not prove

The review noted limited long-term safety data, so the signal does not remove safety screening.

What shoppers should check

  • Check root vs root/leaf extract and withanolide standardization.
  • Avoid pregnancy/breastfeeding unless cleared by a clinician.
  • Review thyroid, liver, autoimmune, sedative, blood pressure, diabetes medication, and surgery context.