Ashwagandha

Last updated: May 29, 2026

Ashwagandha (Withania somnifera) is an adaptogenic herb used in traditional Ayurvedic practice and now sold widely as a stress and sleep supplement. Modern products are usually standardized root extracts, sometimes branded (for example KSM-66 or Sensoril). Evidence for stress and sleep is promising but still developing. Pregnant people and those with thyroid or autoimmune conditions should be cautious. This page is informational and not medical advice.

What dose of ashwagandha should you take?

Studies commonly use standardized root extract in the range of roughly 300-600 mg per day, often split into two doses, for several weeks. Doses and standardization vary widely between products, so the milligrams on one label are not directly comparable to another. Ashwagandha has been linked in rare reports to liver issues, so discontinue and seek care if you feel unwell. This is general consensus guidance, not a personal dose recommendation.

• NIH National Center for Complementary and Integrative Health — Ashwagandha
• Examine.com — Ashwagandha evidence summary

Which ashwagandha brands are third-party tested?

Informational only — not medical advice. Talk to a clinician or pharmacist before starting any supplement.