KSM-66, Sensoril, and Shoden are different ashwagandha extracts, not interchangeable doses of the same ingredient. KSM-66 uses root; Sensoril and Shoden use root and leaf. The studies below do not establish a universal winner. Choose by the exact preparation studied, your goal, and whether ashwagandha is appropriate for you—not the largest milligram number.
Comparing extracts starts with three separate questions: What plant material was extracted? How much actual extract is in a serving? And does research on that preparation address the outcome you care about? NIH's evidence overview explains why differences in preparations and doses make broad recommendations difficult.
XWERKS sells Ashwa gummies. This guide compares ingredient evidence and label information; it does not report independent product testing or a clinical trial of Ashwa.
KSM-66 vs. Sensoril vs. Shoden: what actually differs?
The meaningful difference is the complete extract and its supporting evidence, not simply whether it contains leaves. KSM-66's manufacturer identifies it as a root-only extract. Published studies describe Sensoril as a water extract of root and leaf, and Shoden as a root-and-leaf preparation standardized to withanolide glycosides. Withanolides are a group of plant constituents; a standardization percentage describes composition, not a guaranteed clinical effect. KSM-66 ingredient identity; Sensoril study preparation; Shoden trial.
The following are examples from randomized, placebo-controlled human trials. These are study doses, not personal dosing instructions or interchangeable recommendations.
| Extract | Preparation and daily amount | Participants and duration | What the trial can tell you |
|---|---|---|---|
| KSM-66 | Root extract; 300 mg twice daily (600 mg/day) | 64 adults with chronic stress; 60 days | Stress scores and serum cortisol improved versus placebo. A small, single-center trial does not establish superiority over another extract. Chandrasekhar et al., 2012 |
| Sensoril | Root-and-leaf water extract; 125, 250, or 500 mg/day | 131 adults enrolled with high stress; 98 in the final analysis; 8 weeks | The authors reported reduced stress at each tested dose. Loss of participants from the final analysis limits confidence. Pandit et al., 2024 |
| Shoden | Root-and-leaf extract standardized to 35% withanolide glycosides; 60 or 120 mg/day | 60 participants meeting generalized anxiety disorder criteria, with elevated anxiety scores and morning cortisol; 60 days | Anxiety and stress measures improved versus placebo. This selected population is not representative of every healthy gym-goer. Mishra and Kumar, 2024 |
The KSM-66 manufacturer lists the 2012 trial in its research catalog. Each study above compared an extract with placebo, not with the other two extracts. Comparing percentages of improvement across those trials would mix different participants, doses, and study methods.
Which extract should you choose for stress or sleep?
Start with evidence that matches your goal; there is no defensible winner based on these three stress trials alone. A trial measuring stress does not automatically establish better sleep, improved strength, or faster recovery.
- If you prefer a root-only preparation: KSM-66 fits that ingredient preference. Its root-only identity does not by itself prove it is safer or more effective than a studied root-and-leaf extract.
- If you are considering Sensoril: evaluate its own studies and the amount listed on your product. A lower extract weight than KSM-66 is not automatically an inadequate dose; the preparations differ.
- If you are considering Shoden: its concentrated profile makes direct milligram comparisons especially misleading. Read the participant criteria before assuming a result applies to ordinary day-to-day stress.
- If sleep is the main concern: look for trials that actually measured sleep in a relevant population. The stress-focused examples above cannot rank the extracts for insomnia.
NIH summarizes the overall evidence as promising but limited by differing preparations and generally small, short studies. That leaves uncertainty about the best extract and dose for an individual. Persistent anxiety or sleep problems deserve assessment rather than repeated supplement switching. NIH: evidence and implications for use.
Does a higher withanolide percentage mean a better extract?
A higher percentage means more of the stated constituent per unit of extract under that specification. It does not prove a larger benefit. Compare the named constituents and measurement specifications as well as the percentage. “Withanolides” and “withanolide glycosides” should not be treated as identical label claims without checking what was measured.
Here is an illustrative calculation, not a comparison of particular brands: 300 mg of extract standardized to 5% supplies 15 mg of the stated constituents; 150 mg standardized to 10% also supplies 15 mg. Matching that arithmetic does not demonstrate that the extracts have the same composition, absorption, effects, or safety.
A practical rule is to match the extract identity + actual daily extract weight + standardization + study population + measured outcome. If a seller cites a trial but cannot identify how its ingredient matches, treat the claimed result as unverified for that product.
What about generic extracts and whole-root powder?
A trademark makes an ingredient easier to identify; it is not a guarantee that every product containing it will deliver a study result. An unbranded extract may state its plant part, extraction ratio, and standardization clearly. Whole-root powder is another preparation again. Neither should inherit another extract's research merely because all are labeled ashwagandha.
Ask for the actual ingredient specification and the study on that preparation. Do not substitute a root-equivalent number for extract mass, or apply a capsule trial to a gummy without checking the ingredient and dose. For format-specific comparisons, see our ashwagandha gummy label guide.
Worked label example: what Ashwa's 1,500 mg means
XWERKS Ashwa's current Supplement Facts panel lists 50 mg of a 30:1 root extract per two gummies, equivalent to 1,500 mg of root. It also states 3% withanolides, supplying 1.5 mg. These are three different quantities. View the Supplement Facts image.
Read the serving in this order:
- Actual extract: 50 mg per two gummies.
- Root equivalent: 50 mg × 30 = 1,500 mg.
- Withanolides: 50 mg × 0.03 = 1.5 mg.
Applying 3% to 1,500 mg would produce 45 mg—and would use the wrong starting quantity.
The panel does not identify the ingredient as KSM-66, Sensoril, or Shoden. Its two-gummy serving also contains 6 g added sugar. Choose the format with those facts in mind; the named-extract trials above do not establish the effects of the finished Ashwa product. Do not increase the number of gummies to imitate another extract's study dose.
Check suitability before comparing brands
A different trademark does not remove ashwagandha's precautions. NCCIH advises avoiding it during pregnancy and breastfeeding and in people with hormone-sensitive prostate cancer. It is not recommended for people with thyroid or autoimmune disorders or those approaching surgery.
Discuss use with a clinician or pharmacist if you take medication, including sedatives, thyroid hormone, diabetes or blood-pressure medicines, anticonvulsants, or immunosuppressants. Drowsiness and digestive upset can occur; rare liver injury has been reported. Long-term safety remains uncertain. NCCIH: safety and interactions.
Supplement selection is not a substitute for medical care or prescribed treatment. For a comparison with a different botanical, read ashwagandha vs. tongkat ali.
A five-point checklist before you buy
A useful label lets you connect the product to its evidence without guessing. Keep this checklist beside the Supplement Facts panel:
- Identity: Does it name the extract and specify root, leaf, or both?
- Amount: How much actual extract is in the full daily serving?
- Standardization: Which constituents are measured, and is a percentage or milligram amount stated?
- Evidence fit: Does the cited trial match the preparation, dose, population, and goal?
- Personal fit: Are the precautions, format, other ingredients, and serving routine acceptable for you?
Research and product label checked November 3, 2026. The study table presents selected examples, not an exhaustive review or a head-to-head trial. Ingredient studies are kept separate from finished-product claims.
Make the label your starting point
Considering a gummy? Review Ashwa's extract details, serving size, and full ingredient list before deciding whether it fits your routine.
See Ashwa's full label
