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★★★★★ 4.75 from 148 customers

KSM-66® ashwagandha, 600mg of pure root extract, two capsules a day. First bottle $24.99 with Subscribe and Save, free shipping included.

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KSM-66 ashwagandha supplement

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4.75 out of 5 · 148 reviews

KSM-66® Ashwagandha 600mg, 90 Capsules

Premium Root Extract Capsules

Support calm, sleep, focus, recovery, and your body's natural stress response with KSM-66® ashwagandha root extract, root only at a full 600 mg serving.*

Third Party Lab Tested for purity & potency

Key Benefits

  • Supports stress resilience and calm*
  • Supports sleep and recovery*
  • Supports focus and clarity*
  • Supports the body's natural stress response*
600mg

Per serving

90

Capsules

45

Day supply

KSM-66®

Root extract

Choose Your Purchase Option

Why OptiBio? +
Single active ingredient, full 600 mg serving of KSM-66® root extract, third party tested for purity and potency, with a 90 day money back guarantee.
Benefits +
Supports stress resilience and calm, healthy sleep, focus and clarity, and the body's natural stress response.*
How to Use +
Take 2 capsules daily with food, or as directed by your healthcare professional. Give it consistent daily use.
Ingredients +
KSM-66® Ashwagandha root extract 600mg (standardized to 5% withanolides). Vegan capsule. Free of gluten, soy, and dairy.
Supplement Facts +
Supplement facts panel
Science & Clinical Ingredient +
KSM-66® is the branded ashwagandha root extract studied in numerous published human clinical studies. See the science.
FAQs +
Common questions about dosing, timing, and what to expect. Read the FAQ.

Tested, then shown to you

Every batch is third party tested for identity, potency, heavy metals, and microbes. Made in a GMP certified US facility.

600mg
KSM-66® root extract
5%
withanolides
Root
only, no leaf
Every
batch tested

Before you claim it

Is the 50% off real?+

Yes. Your first Subscribe and Save bottle is $24.99 instead of $49.99, applied automatically, no code. After that it is $36.99 every 45 days. Cancel anytime.

What if it is not for me?+

90 day money back guarantee. No questions asked, full refund, keep the bottle.

How fast will I feel it?+

Ashwagandha builds over weeks, not hours. It works gradually with consistent daily use. That is why the guarantee is 90 days.

How do I take it?+

Two small capsules a day with food, together or split morning and evening. One bottle is 45 days.