KSM-66 vs. Other Ashwagandha Extracts: What's the Difference?

What KSM-66 actually tells you

The trademark identifies a specific commercial preparation rather than a new plant. That traceability helps consumers and researchers know more precisely which extract was evaluated.

Why standardization matters

Ashwagandha contains multiple compounds, including withanolides. Extracts can differ in plant part and concentration. Standardization gives more information about consistency, but a higher standardized percentage is not automatically evidence of superior clinical outcomes.

How to compare two labels

Look at plant part, extract name, milligrams per serving, standardization information, serving directions, other active ingredients, and whether studies supporting the claim actually used that preparation. Do not compare products on milligrams alone.

How this fits into the bigger ashwagandha picture

This page answers one narrow question. For benefits, dosage, timing, extract differences, sleep evidence, cortisol, and safety in one place, use our complete Ashwagandha for Women guide. That pillar also links to the rest of the Calm Series so you can move between related questions without relying on disconnected search results.

Safety belongs in every ashwagandha conversation

NCCIH says ashwagandha may be safe for short-term use up to about three months, but long-term safety is not established. It can cause drowsiness and gastrointestinal symptoms, and rare liver injury has been reported. Avoid during pregnancy and breastfeeding. People with thyroid or autoimmune disorders, those approaching surgery, and people using potentially interacting medicines should seek professional guidance.

Read about ashwagandha side effects and interactions →