Compare ashwagandha supplements on the amount of root extract per daily dose, whether the extract is a named, standardised type such as KSM-66, and the cost per day. Ashwagandha has no authorised health claims in Great Britain and is under UK safety review, so read the safety notes below first.
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Is ashwagandha safe?
Its safety is under review in the UK. The Food Standards Agency (FSA) has said there are no safe levels established or set limits for ashwagandha in food supplements in the UK, citing reports of effects on thyroid hormone levels, low blood sugar and possible liver toxicity, and asked the Committee on Toxicity to assess it. The committee was still discussing a draft statement on ashwagandha in September 2026.
Which? reports that the FSA advises people with pre-existing liver conditions and pregnant women to avoid ashwagandha supplements. If you take medication, have a thyroid or liver condition, have diabetes, or are pregnant or breastfeeding, speak to your GP or pharmacist first.
What does ashwagandha do?
We can't tell you it does anything specific, because no health claim for ashwagandha is authorised in Great Britain. The assessment of health claims for plant (botanical) ingredients was put on hold by the European Commission, and only claims on the GB register may be used.
Which? notes that many ashwagandha studies are small, often involving fewer than 100 people, and run for only 8 to 12 weeks, and that many are funded by the companies that make the extracts. "Where evidence is limited or inconclusive, we should say so openly," says Andy Arshad, who runs SupplementHQ.
Gummies or capsules?
Compare the amount of extract per daily dose first, then the format. This collection has ashwagandha gummies and a KSM-66 extract product; gummies can contain added sugars, and the amount of extract per day varies from product to product.
How to compare value (example figures, not real products): a £12 pot of 60 gummies, two a day, costs 40p a day. A £15 pot of 60 capsules, one a day, costs 25p a day. Check the extract amount in each daily dose before deciding which is better value.
We sell the products on this page. That's our commercial interest, and it's why we show the evidence alongside them. This page is general information for adults, not personalised medical advice. Food supplements should not replace a varied, balanced diet.
Written by Andy Arshad, SupplementHQ. Last reviewed 11 October 2026.