The effectiveness of Ashwagandha varies by form and preparation. Studies show these options, ranked by bioavailability:
- Root extract (standardized to 5% withanolides): Most researched and effective
- KSM-66®: Patented full-spectrum extract with high concentration
- Powder form: Traditional but less concentrated
- Tinctures: Good absorption but varying potency
Look for products standardized to contain 5% withanolides and preferably using root extract rather than leaf. High-quality supplements should provide third-party testing results. The most studied dose range is 300-600mg of root extract daily.
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Last Updated: October 5, 2025
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