22.09.2026

Ashwagandha: what the research says, what the law forbids saying

By Bumpy Nutrition

Racines d'ashwagandha et poudre sur ardoise sombre, lumière violette

Ashwagandha (Withania somnifera) is probably the best-selling plant of the moment. It is also the one about which you will read the most illegal promises. This guide explains where the file actually stands — and how to choose without being told stories.

Let us start with the uncomfortable part

In the European Union, no health claim is authorised for ashwagandha. None.

The reason is administrative rather than scientific. When the EU register of claims was drawn up, thousands of applications concerning plants were put on hold by the Commission, pending a fundamental debate on how botanical substances should be assessed. That file has been frozen for more than ten years. The plants concerned are therefore in a legal vacuum: nothing can be asserted, and nothing refuted.

In practice: a brand that writes “reduces stress”, “improves sleep” or “increases testosterone” on a tub of ashwagandha is breaking the rules, even if it cites a study. So we will not write it.

What the plant actually is

Ashwagandha is a shrub of the nightshade family, grown mainly in India. It is the root that is used as a food supplement, where it has held a central place in the Ayurvedic pharmacopoeia for centuries.

Its most studied components are the withanolides, a group of steroidal lactones. The quality of an extract is judged on their content — and that is almost always where labels become evasive.

How to read an ashwagandha label

Three pieces of information matter. If one is missing, be suspicious.

1. Powder or extract?

Simply dried and ground root has nothing to do with a concentrated extract. “500 mg of root powder” and “500 mg of extract” are two completely different products at the same displayed price.

2. The extraction ratio

A 10:1 extract means it took 10 g of raw material to obtain 1 g of extract. The higher the ratio, the more concentrated the extract.

3. The withanolide content

This is the decisive figure, often expressed as a percentage. An extract standardised to 5 % withanolides contains five times more active molecules than one at 1 %, weight for weight. A label that announces a big number of milligrams without ever giving that percentage is mainly selling you weight.

What the research says, without extrapolating

There is a significant number of randomised clinical trials on ashwagandha, mostly conducted in India, generally on modest sample sizes (30 to 100 participants) and over short durations (8 to 12 weeks). Several recent meta-analyses summarise them.

This body of work is considered promising but still insufficient by the European authorities to authorise a claim: limited sample sizes, heterogeneity of the extracts used, frequent manufacturer funding, few independent long-term studies.

That is an honest position, and it is ours: the plant is interesting, the research is progressing, and it is too early to promise you a result.

Precautions

  • Not recommended for pregnant or breastfeeding women.
  • Caution in cases of thyroid disorder or autoimmune disease: ask your doctor.
  • Possible interactions with sedatives, immunosuppressants and thyroid medication.
  • Respect the dose stated on the label. “Natural” does not mean “without effect”.

Our formulas

We offer ashwagandha in two forms: 180 capsules for a 90-day course, and apple-flavoured chewable gummies combined with vitamin D2. The extract, its ratio and its content appear on each product page — not in a footnote.

The rest of the category is in Sleep & stress.

What to remember

  • No health claim is authorised for ashwagandha in Europe: the botanicals file has been frozen for more than ten years.
  • Compare three things: powder or extract, extraction ratio, withanolide content.
  • The research is promising but still short and rarely independent.
  • Any brand promising you a quantified effect from this plant is breaking the regulation.

Sources

Food supplements are no substitute for a varied and balanced diet or a healthy lifestyle. Not recommended for pregnant or breastfeeding women or for people on medication.