★★★★★

Rated 4.75 by real customers.

4.75 out of 5 across 140+ verified reviews, collected through Judge.me.

Collected through Judge.me and shown exactly as customers wrote them.

★★★★★

Better than expected

This has worked well as part of my nighttime routine. I like the capsule format and have not noticed any unwanted aftertaste.

Samantha · March 2026
★★★★★

Consistent and easy to take

I was looking for a KSM-66 product in capsule form and decided to try this one. So far, I am very satisfied with the purchase. I usually take it in the evening.

Elena · March 2026
★★★★★

So far so good

I like the clean look of the bottle and the easy serving size. It is one of the few supplements I actually remember to take consistently.

Patrick · June 2026
★★★★

Solid product

It fits well into my evening routine and has been easy on my stomach when taken with food. I am satisfied so far.

Anna · April 2026
★★★★★

Really pleased

No complicated routine and no strong smell. I take the capsules with food and they have been easy on my stomach.

Steven · April 2026
★★★

Still deciding

The product arrived sealed and the capsules were fine, but I have not noticed much difference yet. I will finish the bottle before deciding whether to reorder.

Andrea · March 2026
★★★★★

Very happy with it

What I like most is how uncomplicated it is. The directions are clear, the capsules are easy to take, and the bottle is neatly packaged.

Jessica · May 2026
★★★★

Would consider buying again

I am happy enough with my first bottle and may order again. It is simple to take and arrived in good condition.

Diana · June 2026
★★★★★

A solid daily supplement

I have tried a few ashwagandha products and this is one of the easiest for me to stay consistent with. I plan to keep using it.

Kelly · May 2026

Reviews reflect individual experiences with a daily wellness routine. Individual results vary.

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View Supplement Facts

Third Party
Tested

90 Vegan
Capsules

45 Day
Supply

KSM-66®
Root Only
Trusted wellness support

KSM-66® Ashwagandha 600mg, 90 Capsules, Optibio

Premium Root Extract Capsules

Support calm, sleep, focus, recovery, and balanced cortisol levels with clinically studied KSM-66® ashwagandha root extract.

Third Party Lab Tested, every batch verified for purity & potency

Key Benefits

  • Supports stress resilience and calm*
  • Supports sleep and recovery*
  • Supports focus and clarity*
  • Supports balanced cortisol levels*
600mg

Per serving

90

Capsules

45

Day supply

KSM-66®

Root extract

Choose Your Purchase Option

New here? Your first bottle is 50% off, and you can cancel anytime. No reason to wait.

90 Day
Money Back Guarantee

Third Party
Tested

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Checkout

Why OptiBio? +
Single ingredient, full 600mg clinical 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 balanced cortisol levels.*
How to Use +
Take 2 capsules daily with food, or as directed by your healthcare professional. Give it 4 to 6 weeks of consistent 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.