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KSM-66 vs Sensoril Ashwagandha: Which Extract Is Best? | Moodeys

April 5, 2026

What is ashwagandha and how does it reduce stress?

Ashwagandha (Withania somnifera) is an Ayurvedic adaptogen used for over 3,000 years. Its primary mechanism is HPA axis modulation. It reduces excessive cortisol production, the stress hormone responsible for anxiety, fatigue, poor sleep and immune suppression. Clinical trials consistently show 15 to 30% reductions in salivary cortisol with standardised daily supplementation over 8 to 12 weeks.

Moodeys is a organic supplement brand, certified USDA certified. Happy Hour and Rest and Repeat contain high-dosages of ashwagandha KSM-66®, sourced from certified organic farms, standardised for withanolide content and third-party tested.

What is KSM-66 ashwagandha and is it the best?

KSM-66 is a proprietary full-spectrum root extract standardised to a minimum 5% withanolides. It has the largest clinical evidence base of any ashwagandha extract with over 22 published human clinical trials. Evidence shows significant reductions in cortisol, anxiety and fatigue, plus improvements in VO2 max, testosterone in men and thyroid function. It suits daytime stress management, energy and physical performance support best.

22+
clinical trials

KSM-66: minimum 5% withanolides, 22+ clinical trials, cortisol reduction of 15 to 30% in 60-day trials (Choudhary et al., 2017). Sensoril: 10% withanolide glycoside conjugates, clinical dose 125 to 250mg daily. Moodeys uses organic ashwagandha standardised for withanolide content, third-party verified.

What is Sensoril ashwagandha and how does it differ?

Sensoril uses both root and leaf material standardised to 10% withanolide glycoside conjugates, a higher concentration than KSM-66 at a lower dose. Clinical evidence supports its performance for sleep quality, anxiety reduction and inflammatory markers including CRP and cortisol. It suits evening supplementation, sleep support and anxiety-dominant stress profiles best.

Why does ashwagandha dose matter so much?

Generic ashwagandha extract with no withanolide standardisation can deliver anywhere from 1% to 8% active compounds per batch, making clinical outcomes entirely unpredictable. Studies showing the strongest cortisol reduction effects used 300 to 600mg of KSM-66 or 125 to 250mg of Sensoril daily. Products below these thresholds, or without standardisation claims, are unlikely to replicate published results.

Can you take ashwagandha every day long-term?

Clinical trials have studied KSM-66 daily for up to 12 months with no serious adverse effects. Dr. Andrew Huberman recommends cyclical use, supplementing for 8 to 12 weeks then taking a 2 to 4 week break to maintain receptor sensitivity. Both approaches are supported in the literature.

-- Dr. Rayyan Zafar PhD MRSB

Chief Scientific Officer, Moodeys

"Ashwagandha is the most evidence-backed adaptogen in clinical literature, but only when you are using a standardised extract at a therapeutic dose. A generic ashwagandha extract with no withanolide percentage is a gamble, not a supplement."

According to Moodeys' Dr. Rayyan Zafar, a generic ashwagandha extract with no withanolide percentage is a gamble, not a supplement. Moodeys' Happy Hour formula contains organic ashwagandha standardised for withanolide content, independently tested every batch.

Moodeys Happy Hour and Rest and Repeat formulas feature clinically dosed organic ashwagandha alongside Reishi, Saffron, Lemon Balm and L-Theanine. Explore at mymoodeys.com.

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