What dose of ashwagandha do studies use?

Published human trials have most commonly used 240 to 600 milligrams per day of standardised root extract, typically for 6 to 12 weeks, in adult participants. Whole root powder doses in traditional use and studies are usually higher because the root is not concentrated. We describe study designs rather than summarising outcomes, because ashwagandha has no authorised health claims in the UK.

Can ashwagandha supplements make health claims in the UK?

No. There are no authorised health claims for ashwagandha on the GB or EU registers. Claims about stress, cortisol, sleep, anxiety or energy on ashwagandha products are not authorised. Where a combination product carries a lawful claim, that claim belongs to an added vitamin or mineral in the formula, not to the ashwagandha.

Which Vitality ashwagandha product should I choose?

Choose Organic Ashwagandha Root 800mg if you want a single-ingredient, organic whole-root product with nothing else in the capsule. Choose Cortisol Balance if you specifically want the KSM-66 standardised extract, which comes as part of a seven-ingredient formula that also includes rhodiola, L-theanine, phosphatidylserine and magnesium.

Best Ashwagandha Supplement UK (2026): Root vs KSM-66, and the FSA Review Explained

Q: Is ashwagandha legal in the UK in 2026?

Yes. Ashwagandha food supplements are legally sold in the UK. However, the Food Standards Agency is currently conducting a risk assessment of ashwagandha in food supplements, following a Committee on Toxicity request and a 2024 call for evidence. No UK safe upper level has been established, and the outcome of the FSA process may shape future rules. Denmark has banned ashwagandha; the UK has not.

Q: What is the difference between ashwagandha root and KSM-66?

Whole root products contain milled Withania somnifera root, with the plant's compounds at their natural, variable levels. KSM-66 is a branded root extract standardised to a declared withanolide content, so each batch is concentrated and consistent. Neither form has any authorised UK or EU health claims; the difference is composition and standardisation, not permitted claims.

Q: Who should avoid ashwagandha?

Regulatory reviews commonly advise that pregnant and breastfeeding women avoid ashwagandha, and that anyone with a thyroid condition, liver condition, autoimmune condition, or anyone taking prescription medication, including thyroid hormones, sedatives or immunosuppressants, speaks to a doctor or pharmacist before use. These cautions are part of what the FSA review is examining.

Home / Guides / Best Ashwagandha Supplement UK

Best ashwagandha supplement UK: root, extracts and the FSA review.

Ashwagandha is under active regulatory review in the UK. This guide explains that honestly, then compares whole root against standardised extracts like KSM-66 — by composition, not by claims nobody is authorised to make.

Updated 20 Aug 2026First-party guideNo health claims made

UK regulatory status — read this first

Ashwagandha is legal in the UK, and under formal review

Ashwagandha (Withania somnifera) food supplements are legally sold in the UK. But the position is not settled: following a request from the Committee on Toxicity, the Food Standards Agency ran a call for evidence in 2024 and is conducting a risk assessment of ashwagandha in food supplements. No UK safe upper level currently exists. Denmark has banned ashwagandha in supplements; Great Britain has not, and the FSA's outcome will shape any future rules.

Separately, ashwagandha has no authorised health claims on the GB or EU registers. Any product claiming it reduces stress, lowers cortisol or improves sleep is making claims that are not authorised. We do not make them on this page or our labels, and we treat a brand's willingness to make them as a signal about everything else on the label.

Who this guide covers, honestly: we are Vitality Supplements and this page compares our own two ashwagandha products. We do not rank competitors inside a comparison we control — we think that practice is misleading wherever you see it. What we can do is show you exactly how to read any ashwagandha label, including other brands', and be straight about what each of our own products is and is not.

The two products, and who each one is for

Pick 01 · Single ingredient

Organic Ashwagandha Root 800mg

Whole rootOrganic800mg per servingSingle ingredientUK manufactured

Milled organic Withania somnifera root, 800mg per serving, and nothing else. Whole root means the plant's compounds at their natural, variable levels rather than a concentrated extract — the traditional format, at a sensible dose, without excipient clutter. If you want ashwagandha itself, in its simplest honest form, this is the one.

Trade-off, stated plainly: whole root is not standardised, so withanolide content varies batch to batch as it does in the plant. If declared standardisation matters to you, the KSM-66 option below is the better fit.

View Organic Ashwagandha Root

Pick 02 · Standardised extract

Cortisol Balance — with KSM-66 Ashwagandha

KSM-66 root extract7-ingredient formula60 capsulesUK manufactured

This is where our KSM-66 lives. KSM-66 is a branded root-only extract standardised to a declared withanolide content, produced under a documented extraction process — the most studied commercial ashwagandha extract. In this product it sits within a seven-ingredient formula alongside rhodiola rosea, L-theanine, phosphatidylserine, magnesium glycinate and vitamins C and B.

Trade-off, stated plainly: it is a combination product, not a pure ashwagandha capsule. If you want KSM-66 specifically and are happy with the accompanying ingredients, choose this; if you want ashwagandha alone, choose the root product above.

View Cortisol Balance

Root powder vs standardised extracts: the actual difference

Most "which ashwagandha" confusion is about form. The difference is composition and consistency — not permitted claims, because there are none for any form.

Form	What it is	Standardisation	Typical label dose
Whole root powder	Milled dried root, the traditional format	None — natural, variable withanolide levels	Higher (often 500–1,000mg+), because it is not concentrated
KSM-66	Branded root-only extract	Declared withanolide content per batch	Typically 300–600mg in study protocols
Sensoril	Branded root + leaf extract	Declared withanolides, different profile (uses leaf)	Typically 125–250mg in study protocols
Generic "extract 10:1" etc.	Unbranded concentrate	Ratio claims without verified withanolide declaration are weak information	Varies — treat undeclared standardisation sceptically

One flag worth knowing: root-only versus root-plus-leaf matters in the regulatory discussion, because some safety questions raised in European reviews centre on leaf-derived preparations. KSM-66 is root-only; our organic product is root-only. Check this line on any label you compare.

What the research actually looks like

Because ashwagandha has no authorised claims, we describe study designs and leave outcomes to your own reading. Published human trials have mostly used standardised root extracts at 240–600mg per day, over 6–12 weeks, in adult populations, with randomised double-blind placebo-controlled designs in the better studies — sample sizes commonly between 50 and 130. Trials on whole root powder are fewer and use higher gram-level doses reflecting traditional practice. If you want to evaluate the evidence, search Withania somnifera on PubMed and read the trial registrations alongside the papers: dose, duration, population and funding source tell you most of what you need.

How to read any ashwagandha label — including other brands'

01 · Root, or root and leaf? The label should say. Root-only is the conservative choice while the FSA review runs.

02 · Standardised or whole root — and is it declared? "Extract" without a withanolide declaration tells you almost nothing. Whole root is legitimately unstandardised; an extract should state its percentage.

03 · Dose per serving, not per capsule. Check how many capsules make the label's serving, and what that costs per day.

04 · Claims discipline. Stress, cortisol, sleep and anxiety claims are not authorised for ashwagandha in the UK. A brand making them is telling you how it treats rules.

05 · Third-party testing. Look for independent lab verification of identity and purity. Ours is tested by an independent ISO/IEC 17025-accredited laboratory.

06 · The exclusions taken seriously. Pregnancy, breastfeeding, thyroid or liver conditions, and prescription medicines are the standard caution areas raised in regulatory reviews. A responsible label says so.

Questions people actually ask

Is ashwagandha legal in the UK in 2026?

Yes — legally sold, while the FSA conducts a risk assessment following a Committee on Toxicity request and a 2024 call for evidence. No UK safe upper level exists yet. Denmark has banned it; the UK has not.

What is the difference between ashwagandha root and KSM-66?

Whole root is milled plant material with naturally variable compound levels. KSM-66 is a branded root-only extract standardised to a declared withanolide content. The difference is composition and consistency — neither has authorised health claims.

What dose do studies use?

Most published trials use 240–600mg per day of standardised root extract for 6–12 weeks in adults. Whole root doses run higher because the material is not concentrated. We describe designs, not outcomes — there are no authorised claims to summarise into.

Who should avoid ashwagandha?

Regulatory reviews consistently advise pregnant and breastfeeding women to avoid it, and anyone with thyroid, liver or autoimmune conditions — or taking prescription medicines including thyroid hormones, sedatives or immunosuppressants — to speak to a doctor or pharmacist first.

Can ashwagandha products make health claims in the UK?

No. There are no authorised GB or EU health claims for ashwagandha. Where a combination product carries a lawful claim, it belongs to an added vitamin or mineral, not the ashwagandha.

Which Vitality product should I choose?

Organic Ashwagandha Root 800mg for a single-ingredient, organic whole-root capsule. Cortisol Balance for KSM-66 specifically, as part of a seven-ingredient formula. The honest answer depends on whether you want ashwagandha alone or a standardised extract in a blend.