Feel the difference. Every single day.
KSM-66® Ashwagandha works at the root, calming your stress response, deepening your sleep, and sharpening your focus without sedation or stimulants.
in 60 days
Stress & Calm
Reduces cortisol by 27.9% in 60 days. Clinically confirmed.
HPA axis supportSleep & Recovery
Improves sleep quality, onset time, and morning alertness.
No dependencyFocus & Clarity
Removes the cortisol load causing brain fog and slow thinking.
Cognitive supportMood & Resilience
Balances the hormonal environment that drives how you feel.
Whole body balance
Your body is running on cortisol overdrive.
Chronic stress isn't just a feeling, it's a measurable biological state. When cortisol stays elevated, it disrupts sleep, impairs focus, and quietly erodes your health over time.
Constant mental fog
Waking up exhausted
Running on empty
Overwhelmed daily
Can't focus for long
Mood swings and irritability
Cortisol should fall through the day. KSM-66® is clinically shown to lower serum cortisol by 27.9% in 60 days.
Clinically studied. Backed by research.
Optibio uses KSM-66®, a root only ashwagandha extract supported by 50+ human clinical studies and over a decade of research.
Full spectrum. Root only.
Clinically studied.
KSM-66® is a full spectrum, clinically studied extract made only from ashwagandha root. Backed by 50+ human clinical studies and over a decade of research.
Patented extraction
Solvent free process
Root only extract
Studied across stress, sleep, and focus
One ingredient. A whole body reset.
KSM-66® works at the root of your stress response. Calm that one system and the benefits cascade across your sleep, focus, mood, and energy.
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.
Key Benefits
- Supports stress resilience and calm*
- Supports sleep and recovery*
- Supports focus and clarity*
- Supports balanced cortisol levels*
Per Serving
Capsules
Servings
Root Extract
90 Day
Money Back Guarantee
Third Party
Tested
Secure
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Why OptiBio? +
Benefits +
How to Use +
Ingredients +
Supplement Facts +
Science & Clinical Ingredient +
FAQs +
Not all ashwagandha is the same.
The ingredient name is only the start. What matters is the extract, the dose, the testing, and the manufacturing standard behind every bottle.
Optibio vs. Generic Ashwagandha
The difference is not just the ingredient name. It's the extract, dose, testing, and manufacturing standard behind every bottle.
| Feature | Optibio KSM-66® | Generic Ashwagandha |
|---|---|---|
| Clinical Evidence | 50+ human studies | Rarely studied |
| Extract Source | Root only | Often root + leaf |
| Active Standard | 5% withanolides | Typically 1 to 2% |
| Extraction Method | Patented, solvent free | Often chemical based |
| Quality Testing | Third party tested | Usually not tested |
| Manufacturing | USA, GMP certified | Varies |
Two capsules. Once a day. That's it.
No complicated protocols. No timing windows. Just 2 capsules with water after breakfast or dinner, and let the science do the rest.
once daily
Premium Ingredients
KSM-66® sourced from certified, ethical partners with full traceability.
Third Party Tested
Every batch independently tested for purity, potency, and contaminants.
GMP Certified
Manufactured in a USA cGMP certified facility under pharmaceutical standards.
No Fillers
No artificial colors, flavors, binders, or unnecessary additives.
Sustainable
Ethical sourcing, solvent free extraction, and responsible manufacturing.
Questions before you start?
Everything you need to know about KSM-66®, Optibio, and what to expect.
KSM-66® is the world's most clinically studied ashwagandha root extract, backed by 50+ human clinical trials and over a decade of published research. It's made exclusively from the root (not the leaf), using a patented, solvent free extraction process that preserves the full spectrum of active withanolides. Most ashwagandha supplements on the market use generic powder with no standardization and no clinical evidence behind the specific extract. KSM-66® is the difference between a supplement that has been studied and one that hasn't.
Ashwagandha works by modulating the HPA (hypothalamic pituitary adrenal) axis, the system that governs your body's cortisol output. Chronic stress keeps this axis in a state of overactivation, leading to elevated cortisol throughout the day. KSM-66® has been shown in double blind, placebo controlled trials to reduce serum cortisol by 27.9% in 60 days. It doesn't sedate you or mask symptoms, it addresses the biological mechanism driving the stress response.
Yes. KSM-66® at 600mg/day has been extensively studied for safety and is well tolerated in clinical trials lasting up to 90 days. It is non habit forming and does not cause dependency. The most common side effect in a small number of people is mild gastrointestinal sensitivity, taking it with food resolves this in almost all cases. If you are pregnant, nursing, or taking prescription medication (particularly immunosuppressants or thyroid medication), consult your physician before starting.
Three things separate Optibio from most ashwagandha products on the market. First, we use KSM-66®, the specific extract that has been studied in 50+ clinical studies. Most brands use unbranded ashwagandha powder with no clinical backing. Second, we use the full 600mg clinical dose. Many competitors use 200 to 300mg, below the threshold studied in trials. Third, every batch is third party tested for purity and potency, and manufactured in a USA GMP certified facility. We don't cut corners on the ingredient, the dose, or the manufacturing standard.
Most people notice the first signs of improvement, calmer days, less reactive to stress, slightly better sleep, within 2 to 4 weeks of consistent daily use. The full clinical effect builds over 6 to 8 weeks as cortisol levels normalize. This is why we recommend starting with a subscription, it gives you enough time to experience the full benefit and make a fair assessment. The 90 day money back guarantee exists precisely because we know results take time and we want you to have the full window to judge.
You get a full refund, no questions, no forms, no hassle. Email us at support@optibiosupplements.com within 90 days of your purchase and we will refund your entire order. We take on the risk so you don't have to. We're confident in the science behind KSM-66® and in our product, but we also know that no supplement works identically for every person, and we believe you should be able to try it without financial risk.