Where to Buy

These are our recommended products based on formula quality, clinical dosing, third-party testing, and value. We only recommend supplements that use clinically studied forms at research-backed doses.

Top Pick

Nutricost KSM-66® Ashwagandha

600mg per capsule · 60 capsules

Uses KSM-66 — the most clinically studied ashwagandha extract with 22+ double-blind trials. Standardized to 5% withanolides. Includes BioPerine for enhanced absorption.

✓ KSM-66® extract✓ 5% withanolides✓ BioPerine added
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Best Value

Physician's Choice KSM-66® Ashwagandha

1000mg per serving · 60 capsules

Higher dose (1000mg vs 600mg) with the same KSM-66 extract and black pepper for absorption. Organic, vegan capsules. Excellent reviews with 4.5+ stars.

✓ 1000mg per serving✓ Organic KSM-66✓ Black pepper extract
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Affiliate Disclosure: As an Amazon Associate I earn from qualifying purchases. Product links on this page may earn us a commission. This does not influence our evidence ratings or rankings — our methodology is applied consistently regardless of affiliate status.