Ashwagandha: The Adaptogen That Changed Stress Research
Research
Intermediate
Evidence-based
Last medically reviewed:
Ashwagandha has been used in Ayurvedic medicine for 3,000 years. Modern science confirms its unique place among adaptogens.
How Ashwagandha Works
Withanolides — the active compounds — modulate the HPA axis, reducing cortisol output by 14–32% in stressed individuals across multiple trials.
Clinical Evidence
A 2021 systematic review of 12 RCTs found:
- Anxiety scores: significant reduction
- Sleep quality: improved PSQI scores
- Cortisol: 18% average reduction
Effective Dosing
600mg daily of standardized extract (KSM-66 or Sensoril) split into two doses. Results typically appear within 4–8 weeks.
Safety Profile
Generally well-tolerated. Avoid during pregnancy. Can interact with thyroid medications and immunosuppressants.
Frequently asked questions
Can I take ashwagandha long-term?
Most studies run 8–12 weeks. Long-term safety beyond 6 months is less well-established — cycling is prudent.
Does ashwagandha cause drowsiness?
Not typically. Unlike sedatives, it normalizes rather than suppresses. Still, take evening doses if you feel mildly relaxed.
References
- Pratte MA et al. "An alternative treatment for anxiety: systematic review of human trial results for ashwagandha." J Altern Complement Med. 2014. https://pubmed.ncbi.nlm.nih.gov/25405876/
- Lopresti AL et al. "An investigation into the stress-relieving and pharmacological actions of an ashwagandha extract." Medicine. 2019. https://pubmed.ncbi.nlm.nih.gov/31517876/
- Salve J et al. "Adaptogenic and Anxiolytic Effects of Ashwagandha Root Extract in Healthy Adults." Cureus. 2019. https://pubmed.ncbi.nlm.nih.gov/32029087/