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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.