What is the recommended dosage and usage of KSM 66 (ashwagandha extract) for stress and anxiety relief?

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Last updated: June 14, 2025View editorial policy

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From the Research

The recommended dosage of KSM-66 Ashwagandha extract for stress and anxiety relief is typically 300-600 mg per day, taken in divided doses, as supported by the most recent and highest quality study 1.

Key Considerations

  • Most clinical studies showing benefits have used 600 mg daily, often split into two 300 mg doses taken in the morning and evening with meals.
  • For best results, take KSM-66 consistently for at least 8-12 weeks, as the adaptogenic effects build over time.
  • Start with a lower dose (300 mg daily) and increase gradually if needed to assess your tolerance.
  • KSM-66 works by helping regulate cortisol levels and supporting the body's stress response systems, as evidenced by reduced cortisol levels in studies 2, 3.
  • It contains a standardized concentration of withanolides, the active compounds responsible for ashwagandha's stress-relieving properties.

Important Notes

  • While generally well-tolerated, some people may experience mild digestive upset, so taking it with food can help.
  • If you're pregnant, nursing, taking medications, or have a medical condition (especially thyroid disorders), consult your healthcare provider before use as ashwagandha may interact with certain medications and conditions.
  • A systematic review and meta-analysis of randomized controlled trials found that Ashwagandha supplementation significantly reduced anxiety and stress levels, with a favorable effect at doses of 300-600 mg/d 4.
  • A recent study found that Ashwagandha root extract alleviated stress, anxiety, and improved quality of life in healthy adults by modulating stress hormones, with a dosage of 500 mg per day standardized for 2.5% withanolides 1.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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