Research · Meta-analysis
Effect of Ashwagandha (Withania somnifera) extract on sleep: A systematic review and meta-analysis
What it found
Ashwagandha produced a small-to-moderate improvement in overall sleep (SMD ≈ −0.59), larger in people with diagnosed insomnia (SMD ≈ −0.84) at ≥600 mg/day for ≥8 weeks.
- Design
- Meta-analysis
- Year
- 2021
- Sample size
- 400
- Population
- adults, healthy and with diagnosed insomnia (5 RCTs)
- Intervention
- ashwagandha extract (≥600 mg/day in stronger trials) vs placebo
- Outcome
- overall sleep quality and sleep parameters
- Journal
- PLoS One
Citation last checked 2026-06-21.