Ashwagandha
Ashwagandha in capsules, tablets, powder and drops, including standardised root extracts such as KSM-66. We explain how the forms differ, what the withanolide percentage on a label means and how to use it.Read more →
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Ashwagandha supplements: root extract, withanolides and what the label tells you
Ashwagandha is the root of Withania somnifera, a shrub from India that is also called Indian ginseng. In the UK it is sold as a food supplement, and a small number of products carry a Traditional Herbal Registration from the MHRA. We start with something most pages leave out: the European food safety authority (EFSA) has approved no health claims for ashwagandha. So you will not read promises here. You will read what is in the bottle and how the options differ.
Root extract, withanolides and extract ratios
Almost all research uses root extract, not leaf. Withanolides are the plant's own active compounds, and the percentage on the label is how strength is measured, usually 2.5% or 5%. A ratio such as 10:1 tells you how much raw root went into one gram of extract. Standardised branded extracts, KSM-66 being the one most UK shoppers recognise, are made so one batch matches the next. Plain milled root is much weaker per gram and tastes bitter, which is why it sits alongside other herbal supplements mainly as a powder for smoothies.
The practical differences between the forms in this collection:
- Capsules and tablets: a fixed amount per serving, no taste, easiest to keep up daily.
- Powder: flexible amounts and usually cheaper per gram, but earthy and bitter.
- Drops and tinctures: useful if you dislike swallowing capsules; check the amount per millilitre.
- Gummies: pleasant to take, but they usually contain less extract and some added sugar.
How we choose the ashwagandha we stock
We look at three things: the form, the dosage and the combinations. We prefer standardised root extracts that state the withanolide percentage, because a bottle that only says "ashwagandha 3000mg" tells you nothing about strength. We are wary of blends that hide the extract in a long list of other botanicals at token amounts. We buy directly from the brands, our compliance team checks every product before it goes live, and independent labs spot-check batches. That is the advice we would give at our own kitchen table, and you can read how we select our brands.
Who it suits, and who should skip it
People usually reach for ashwagandha during demanding periods, or when winding down in the evening is hard, which is why it often sits next to products for stress and relaxation. Be realistic about the timeline: most people who notice anything do so after two to four weeks of daily use, not on the first evening. If nothing has changed after two months, it is fair to stop.
Ashwagandha is not for everyone. It is not recommended during pregnancy or breastfeeding, or for children. If you take thyroid medication, immune-suppressing medicines or have a liver condition, speak to your GP or pharmacist first. UK regulators are still reviewing ashwagandha in food supplements, and rare cases of liver problems have been reported, so keep to the amount on the label and stop if you feel unwell. If ashwagandha does not suit you, Rhodiola rosea is a common alternative for people looking at adaptogens, herbs traditionally used to help the body cope with pressure.
Frequently asked questions
What is ashwagandha?
Ashwagandha is the root of Withania somnifera, a small shrub native to India and parts of Africa, sometimes called Indian ginseng or winter cherry. It has been used in Ayurveda for centuries and is grouped with the adaptogens, herbs traditionally used to help the body deal with pressure. In the UK it is sold as a food supplement. Its measurable active compounds are withanolides, which is why good labels state a withanolide percentage rather than just a total weight.
What do people take ashwagandha for?
Most people buy it during busy or demanding periods, or as part of an evening wind-down routine. We have to be straight with you here: the European food safety authority (EFSA) has approved no health claims for ashwagandha, so no shop in the UK, including us, may promise you a result. What we can tell you is what is in each product and how it is standardised. Traditional use and personal experience are the reasons people choose it, not approved claims.
Which form of ashwagandha should I choose?
It depends on how precise you want to be and whether taste matters to you.
| Form | What it is | Suits |
|---|---|---|
| Capsules and tablets | Standardised root extract | Daily use, fixed amount |
| Root powder | Milled whole root | Smoothies, flexible amounts |
| Drops or tincture | Liquid extract | Trouble swallowing capsules |
| Gummies | Chewable, lower strength | Convenience over potency |
For a consistent daily routine, a standardised root extract in capsule form is the simplest choice.
When is the best time to take ashwagandha?
There is no single right time, so pick the one you will actually remember. Many people take it in the evening as part of a wind-down routine, and it pairs naturally with a bedtime habit. Others prefer the morning with breakfast. Taking it with food helps if you have a sensitive stomach, since mild nausea is the most commonly reported niggle. Whatever you choose, keep it the same every day for a few weeks, otherwise you cannot judge the effect. See our sleep and rest range for evening options.
How long does ashwagandha take to work?
Expect to give it time. Most clinical studies run for eight weeks, and people who notice something usually report it after two to four weeks of consistent daily use. A single dose is not going to do much. Our practical advice: use one product at the amount on the label for six to eight weeks, then decide honestly whether it is worth continuing. If nothing has changed by then, stop rather than doubling the dose.
Who should not take ashwagandha?
It is not recommended during pregnancy or breastfeeding, because there is not enough safety data. It is also not intended for children. If you take thyroid medication, sedatives, blood pressure or blood sugar medicines, or medicines that suppress the immune system, check with your GP or pharmacist first, as interactions are possible. People with a liver condition should avoid it. Rare cases of liver problems linked to ashwagandha have been reported, so stop taking it and seek advice if you feel unwell.
Is KSM-66 better than ordinary ashwagandha?
KSM-66 is a branded root extract that is standardised, meaning the withanolide content is controlled so batches are comparable, and it is the form used in a large share of published trials. That consistency is what you pay extra for, not a different plant. A non-branded extract can be just as good, provided the label states root only and gives a withanolide percentage. What we avoid stocking are products that quote a huge milligram figure with no standardisation behind it.
What is the difference between root and leaf ashwagandha, and why does the withanolide percentage matter?
The root is the traditional part and the part used in nearly all research. The leaf contains a different mix of compounds, including withanone, and its safety profile is less well established. India has restricted the use of ashwagandha leaf in food products, while root remains permitted. That is why we prefer root-only extracts.
The withanolide percentage tells you the strength of the extract. A 5% extract carries twice the withanolides per gram of a 2.5% one, so two bottles with the same milligram figure on the front can differ considerably.
