Ashwagandha
Botanical
Reviewed human evidence related to ashwagandha. Effects depend on dose and context.
Last reviewed: 2026-09-16
Aliases: withania somnifera
Reviewed outcomes
Perceived stress
Ashwagandha · decrease · Magnitude unknown
Some ashwagandha preparations may reduce perceived stress in small trials.
limited evidence · Human data reviewedEvidence, caveats & sources›Sleep quality
Ashwagandha · increase · Magnitude unknown
Some preparations may improve sleep, but evidence is limited.
limited evidence · Human data reviewedEvidence, caveats & sources›