Ashwagandha and Stress: Evidence-Based Guide

Quick Answer

Ashwagandha root extract, at doses of 150 mg and 300 mg, significantly reduces perceived stress levels and improves sleep quality in stressed adults over a 60-day period [Source 2].

Key Takeaways

• A randomized trial with 135 participants showed a 38.6% and 41.6% reduction in Perceived Stress Scale scores with Ashwagandha doses of 150 mg and 300 mg, respectively, over 60 days (p < 0.001) [Source 2].
• Sleep quality and psychological well-being improved significantly in the same trial (p < 0.001) [Source 2].
• Serum cortisol levels, a biomarker of stress, were significantly reduced in the group receiving 300 mg of Ashwagandha [Source 2].
• The study had a completion rate of 93% (126 out of 135 subjects) [Source 2].

Clinical Evidence Deep-Dive

The trial by Thanawala Shefali (2026) assessed the efficacy and safety of Ashwagandha root extract in stressed adults. The study was a randomized, double-blind, placebo-controlled, parallel-group trial involving 135 participants, with 126 completing the study. Participants were divided into three groups, receiving either 150 mg or 300 mg of Ashwagandha or a placebo. The primary outcome was the change in Perceived Stress Scale scores, which showed a significant reduction in stress for both Ashwagandha groups compared to placebo (p < 0.001) [Source 2].

Secondary outcomes included improvements in sleep quality and psychological well-being, assessed through validated questionnaires. Both metrics showed significant enhancement from baseline to day 60 for the Ashwagandha groups (p < 0.001). The study also measured serum cortisol levels, finding a significant reduction in the 300 mg group, indicating a physiological reduction in stress [Source 2].

The trial's methodology was robust, with randomization and blinding reducing potential biases. However, the study's limitation includes its focus on healthy adults, which may not generalize to populations with chronic stress conditions. The sample size, while adequate, could be expanded in future studies to confirm these findings across diverse demographics [Source 2].

Practical Protocol

Clinical reference - consult a physician: The recommended dosage of Ashwagandha root extract for stress reduction is 150 mg to 300 mg daily, as per the trial findings. The extract should be taken in sustained-release capsule form over a period of 60 days to observe significant benefits [Source 2].

FAQ

Does Ashwagandha improve sleep quality? Yes, Ashwagandha significantly improved sleep quality in stressed adults over a 60-day period as evidenced by the trial [Source 2].

Is there a reduction in stress biomarkers with Ashwagandha use? Yes, serum cortisol levels, a stress biomarker, were significantly reduced in participants taking 300 mg of Ashwagandha [Source 2].

Are there any safety concerns with Ashwagandha? The trial reported no significant safety concerns, but as with any supplement, it is advisable to consult a healthcare provider before starting [Source 2].

References

[1] The Effect of Progressive Relaxation Exercises Applied to Individuals With Type 2 Diabetes on FATIQUE Level and Sleep Quality: A Randomised Controlled Study. Vardar Inkaya B. 2026. https://pmc.ncbi.nlm.nih.gov/articles/PMC13053216/

[2] Efficacy and safety of Ashwagandha root extract sustained-release (AshwaSR) capsules in healthy adult, stressed subjects: A randomized, double-blind, placebo-controlled, parallel-group, 3-arm clinical trial. Thanawala Shefali. 2026. https://pmc.ncbi.nlm.nih.gov/articles/PMC12991725/

[3] Nursing Pillows in the Sleep Environment and Sudden Unexpected Infant Deaths — Georgia, January 2013–December 2022. DEPUTY DIRECTOR FOR PUBLIC HEALTH SCIENCE AND SURVEILLANCE. 2025. https://www.cdc.gov/mmwr/volumes/74/wr/mm7419a2.htm

[4] Notes from the Field: Rhodesiense Human African Trypanosomiasis (Sleeping Sickness) in a Traveler Returning from Zimbabwe — United States, August 2024. DEPUTY DIRECTOR FOR PUBLIC HEALTH SCIENCE AND SURVEILLANCE. 2025. https://www.cdc.gov/mmwr/volumes/74/wr/mm7409a3.htm

[5] Clinical Care Interaction and Patient Sleep in the Intensive Care Unit: A Secondary Data Analysis. Islam A. 2026. https://pmc.ncbi.nlm.nih.gov/articles/PMC13071779/