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Ashwagandha: KSM-66 vs Sensoril
Updated October 2026 · How we review
KSM-66 and Sensoril are two widely used branded ashwagandha extracts. Both appear in clinical studies.
| Extract | Plant part | Withanolides | Often chosen for |
|---|---|---|---|
| KSM-66 | Root | About 5% | Daytime use; stress studies |
| Sensoril | Root and leaf | About 10% | Lower doses; often taken in the evening |
Branded extracts make it easier to compare products to the doses used in studies. Unbranded "ashwagandha root powder" is a different, less concentrated product.
Ashwagandha has been linked to rare liver injury and can affect thyroid hormone levels. Avoid it during pregnancy, and ask a doctor if you take thyroid, sedative, immune-suppressing, diabetes or blood pressure medicines.
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