Calm that actually shows up.

★★★★★ Third party tested · 4.75 from 148 reviews

One active ingredient, clearly labeled. KSM-66® ashwagandha, 600mg, studied to support a calmer, steadier baseline. Results vary.

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600mg
KSM-66®
5%
withanolides
1
active ingredient
KSM-66 ashwagandha for stress

Choose how you start

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.

One active ingredient, clearly labeled

No kitchen sink blends

Just KSM-66® ashwagandha at 600mg, the dose actually studied.

Pop it, done

Two small capsules a day. No powders, no horse pills, no shelf of 12 bottles.

Calm, not knocked out

Studied to support a steadier, calmer baseline through your day. Results vary.

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

Why one active ingredient wins

Optibio Typical ashwagandha
Ingredients One: KSM-66® root only Proprietary blends
Dose 600mg, the studied dose Often underdosed
Standardized 5% withanolides Often not
Testing Third party tested, every batch Rarely public
Additives No dyes, no added sugar Dyes, sweeteners common

Any last questions?

How fast will I feel it?+

Ashwagandha builds up over time. It works gradually with consistent daily use. Results vary.

Will it make me sleepy or foggy?+

It is not a sedative. KSM-66® is studied to support a calmer, steadier baseline, not to knock you out. Most people take it and go about their day. Results vary.

What is actually in it?+

KSM-66® is a root only ashwagandha extract standardized to 5% withanolides. We keep our claims modest: with consistent daily use it supports a calmer, steadier baseline over weeks. Results vary.

Is it safe to take every day?+

Ashwagandha is made for a daily habit. If you are pregnant, nursing, on medication, or have a thyroid condition, talk to your doctor first.

What is your guarantee?+

90 days, money back. If it is not for you, we refund you, no drama.

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Ashwagandha for stress · FAQ

Ashwagandha for stress, answered.

Does ashwagandha actually help with stress?
KSM-66® is a root only ashwagandha extract at a full 600 mg serving, and people reach for it to support a calmer, steadier response to everyday stress.† Optibio uses the full 600 mg daily serving. Individual experiences vary.
How long until I feel less stressed?
Adaptogens build over weeks. Some notice a softer baseline in week one; most report meaningful change in weeks two to four. We give you 90 days to decide.
How much ashwagandha should I take for stress?
The full serving is 600 mg of KSM-66® daily: two Optibio capsules, taken together or split morning and evening.

Keep reading: Best ashwagandha for stress, compared →

Ashwagandha for stress

Calmer days start with two capsules.

The full 600 mg dose of a root only extract adaptogen for stress. 90 capsules, third-party tested, backed by a 90 day guarantee.

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