Withania somnifera (KSM-66 extract)
Most clinically studied ashwagandha extract — standardized to 5% withanolides by HPLC. Root-only extract (no leaves). 22+ clinical trials for stress, testosterone, cognition, sleep, and athletic performance. The gold standard ashwagandha product.
Sign in and complete your health profile to see safety warnings personalized to your age, sex, medications, conditions, and allergies for this herb.
If you take any medications, review these interactions carefully.
Thyroid meds, sedatives, immunosuppressants, diabetes meds.
Full contraindication details are available to signed-in users. Create a free account.
GI upset, drowsiness. Rare liver toxicity reports (debated).
Full dosage ranges, extraction ratios, and step-by-step preparation instructions for Ashwagandha KSM-66 are available to members.
Create a free accountPersonalized Guidance
Our Herbal Support Finder matches you with herbs based on your wellness goals, health profile, and medications.
