KSM-66®, Sensoril®, “full-spectrum”, 10:1 and 5% withanolides describe different things. KSM-66® and Sensoril® are branded ingredient specifications; an extract ratio describes starting material relative to extract; and a withanolide percentage describes a marker within that extract. None of these terms, on its own, proves that a finished supplement is better, stronger in use or suitable for you.
Quick label rule: compare the plant part, extract weight, daily serving, extract ratio, declared standardisation, other ingredients and pack duration together. Do not compare one isolated number.
Ashwagandha label terms at a glance
| Term | What it usually describes | What to check next |
|---|---|---|
| Root powder | Dried, milled root rather than a concentrated extract | Amount per daily serving and testing information |
| Generic extract | Concentrated ashwagandha without a consumer-facing brand name | Plant part, ratio and any declared standardisation |
| KSM-66® | A proprietary root extract used as an ingredient in different finished products | Exact amount per capsule and full daily serving |
| Sensoril® | A proprietary root-and-leaf extract used as an ingredient in different finished products | Exact amount, supplier specification and daily serving |
| “Full-spectrum” | A supplier or marketer’s description of a broad constituent profile | The actual specification; the phrase has no single universal numerical meaning |
| 10:1 | A stated drug-extract ratio: ten parts starting herb to one part extract | Whether it is a native extract ratio or a starting-material equivalent, plus the marker specification |
| 5% withanolides | A declared proportion of a group of marker compounds | The extraction method, test method and total extract weight |
What is the difference between powder and extract?
Root powder is dried plant material. An extract is produced by using a process to concentrate selected soluble components from plant material. Because extracts can be made from different plant parts and by different processes, two products with the same milligram figure are not automatically equivalent.
A lower weight of extract is not necessarily “weaker” than a larger weight of powder, but neither should you assume that any extract is superior. The label needs enough detail for a like-for-like comparison.
What does a 10:1 ratio mean?
A 10:1 ratio generally indicates that ten units of starting herb were used to produce one unit of extract. It does not mean the finished capsule will be ten times more effective, and it does not by itself reveal how much of any particular compound is present.
Also distinguish the extract weight from a starting-material equivalent. A label may say that 100mg of a 10:1 extract is equivalent to 1,000mg of starting herb. That does not make the capsule contain 1,100mg; these are two ways of describing the same ingredient.
How do withanolide percentages work?
Withanolides are a group of naturally occurring compounds used as analytical markers for ashwagandha extracts. If—and only if—the label or technical specification declares both the extract weight and the percentage using a defined method, simple arithmetic can estimate the declared marker amount.
For example, 300mg of an extract declared as 5% withanolides corresponds mathematically to 15mg of withanolides. That calculation does not establish effectiveness, safety or equivalence with another extract, because the wider chemical profile and test methods may differ.
KSM-66® and Sensoril®: what can you safely conclude?
KSM-66® is commonly identified as a root-only proprietary extract, while Sensoril® is identified as a proprietary root-and-leaf extract. The useful advantage of a brand name is traceability to a particular supplier specification. It does not make every finished product containing that ingredient identical: serving size, other ingredients, manufacture, storage and label directions still vary.
Do not turn a branded ingredient into a blanket recommendation. Evidence from a study relates to the exact preparation, daily amount, population and study conditions used. It does not authorise a seller to promise outcomes on a GB supplement page.
Is “full-spectrum” a quality grade?
No. “Full-spectrum” is not a single regulated potency grade. Different suppliers may use it to describe different specifications. Treat it as a prompt to read the technical details—not as proof that a formula is more complete or effective.
How our label should be read
Our Ashwagandha Complex declares 400mg KSM-66® ashwagandha per capsule. Its directions are 1 capsule, 1–3 times daily, so the declared ashwagandha intake under those directions ranges from 400mg to 1,200mg a day and the 90-capsule pack lasts 30–90 days.
It is a complex rather than a single-ingredient comparison: nine other botanicals and four B vitamins are also declared separately. The authorised health claims belong to the qualifying B vitamins. The KSM-66® name and amount describe the ashwagandha ingredient; they are not, by themselves, a permitted GB health claim.
Seven checks for a useful ashwagandha label
- The botanical name: Withania somnifera.
- The plant part: root, leaf or both.
- Powder or extract.
- Extract weight per capsule and per daily serving.
- Ratio and standardisation, where declared.
- Complete directions, cautions and pack size.
- Whether marketing claims are tied to an authorised nutrient rather than loosely attributed to the herb.
What GB supplement pages may claim
The Great Britain Nutrition and Health Claims Register contains no authorised health claim for ashwagandha. Describing a product as KSM-66®, root-only, 10:1 or standardised is composition information; using those facts to promise relief from stress, anxiety or sleep problems would be a different matter.
Only authorised claims may be used in GB commercial communications, subject to their conditions of use. A food supplement must not be presented as preventing, treating or curing a medical condition.
A note on safety
The Food Standards Agency says no safe level or set UK limit has yet been established for ashwagandha supplements, and the Committee on Toxicity review was ongoing when checked. This is why an extract guide should not invent a universal “ideal dose” or long-term schedule.
Always follow the finished product’s label. Do not use our product during pregnancy or breastfeeding. Ask a doctor or pharmacist before use if you take medication or have a medical condition.
Continue reading
- What is ashwagandha? Plant parts, extracts and UK label claims
- UK ashwagandha supplements compared by extract, dose and cost
- How to read a supplement label line by line
Sources
- Great Britain Nutrition and Health Claims Register
- UK Government food supplements guidance
- ASA/CAP guidance on food health claims
- Food Standards Agency ashwagandha review
- NIH Dietary Supplement Label Database: Sensoril® ingredient terminology
Written and reviewed by Barry Lees, founder of The Health Improvers. Last reviewed 3 August 2026. General consumer information only; not medical advice. Always read the label.
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