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Best Ashwagandha for Sleep

Top 10 products ranked

Last reviewed May 2026

Clinical dose: 300–600 mg

Why Ashwagandha for Sleep

Ashwagandha plays a supporting role in sleep. Ashwagandha is an adaptogenic herb used in Ayurvedic medicine. Multiple RCTs show reductions in perceived stress and cortisol levels. In clinical studies, ashwagandha can support sleep quality, especially under stress.

What dose to look for

Clinical studies typically use 300–600 mg of ashwagandha. KSM-66 or Sensoril extract range; root extract standardized to withanolides. Products below this range may not deliver meaningful results.

What the research says

Ashwagandha has moderate clinical evidence for sleep benefits. Multiple clinical trials show reductions in stress and cortisol; growing evidence for sleep quality Learn more

Clinical research on Ashwagandha (Withania somnifera)

MODERATE-HIGH — Meta-analysis of 5 RCTs · 300–600 mg/day standardized root extract

•2021 meta-analysis of 5 RCTs (400 participants) found significant effect on overall sleep (SMD = -0.59). Effects were more pronounced with insomnia diagnosis, dosage ≥600 mg/day, and treatment ≥8 weeks. PubMed
•2024 meta-analysis of 5 RCTs confirmed significant improvements in sleep onset latency, total sleep time, PSQI, and sleep efficiency. PubMed
•2025 analysis of 12 RCTs (600+ participants) reported 72% improvement in sleep quality scores vs placebo and 29% reduction in sleep onset time.
•Primary mechanism is indirect — reduces cortisol and modulates the HPA axis, with additional GABAergic activity. Benefits are strongest in stress-related insomnia.

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