Legal status · United Kingdom
Is Ergothioneine legal in the United Kingdom?
Written by Aaron CuhaReviewed Sep 2026
Direct answer
Ergothioneine can be sold in the United Kingdom as a supplement or cosmetic ingredient. Its legal category is "Sold as a supplement". That is not approval as a drug. MHRA has not checked any health claim made for it. Versions you inject, and "research use only" versions, fall outside supplement rules, so that label does not make them legal to use in people. On the evidence, no completed trial in people is cited on its profile (1 human record with no result or no dose given).
- People given it
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- Found nothing
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Legal category
Sold as a supplement
MHRA licensing and unlicensed medicine status, from the Ergothioneine profile.
Reviewed Sep 2026. This is a legal category, not legal advice.
A "research use only" label on a vial does not make it legal to use on people.
Ergothioneine in the United Kingdom at a glance
| Legal category | Sold as a supplement |
|---|---|
| MHRA approval status | Not approved by MHRA as a drug; sold as a supplement or cosmetic |
| Studies in people | 1 of 2 sources on the profile |
| Reviewed | Sep 2026 |
The legal category and note come from the Ergothioneine profile. We checked them against Medicines and Healthcare products Regulatory Agency (MHRA) listings on the reviewed date.
What this means
- 01
Ergothioneine can be sold in the United Kingdom as a supplement, food or cosmetic ingredient, under the legal category above. It has no approval as a drug.
- 02
Being sold as a supplement means MHRA has not checked any health claim. The makers are responsible for safety and labels, and quality varies from product to product.
- 03
Versions you inject, and "research use only" versions, are not supplements. That label does not make them legal to use in people, and anything you inject falls under the rules for medicines.
What Ergothioneine is
An antioxidant from food, mainly mushrooms, that your body pulls into its cells. It is studied as a possible longevity nutrient.
Ergothioneine is a natural amino acid that contains sulphur. You get it from food, mostly mushrooms.
How it works: It builds up in tissues through a pump called OCTN1. There it mops up harmful oxygen molecules and protects mitochondria and DNA.
Approval history: Sold as a supplement or food ingredient; not an approved drug
How MHRA treats this kind of product
Licenses medicines for sale in the UK. A compound without a licence to be sold (a marketing authorisation) is an unlicensed medicine. The law only lets it reach people through a prescriber, under the specials scheme (unlicensed medicines made for one patient's needs). It cannot be sold as a research product.
The legal category above is how The Longevity Archive reads Medicines and Healthcare products Regulatory Agency listings for Ergothioneine on the reviewed date. It is not a legal opinion. Rules change. Bringing a compound into the country, prescribing it and owning it can each be treated differently. Check with the agency before you act on anything here.
Ergothioneine in sport and the military
Whether Ergothioneine is banned in sport is set by the World Anti-Doping Code and by military rules, not by its legal status in the United Kingdom. Before you compete or get tested, look up Ergothioneine by name on the Prohibited List, or look up a named product in Global DRO. Under the World Anti-Doping Code, category S0 bans, at all times, any drug-like substance that meets two tests. No other section of the List covers it. And no government health regulator anywhere has a current approval for it as a treatment in people. Many substances that are approved somewhere are banned by name in another section. So approval does not mean a substance is allowed in sport.
- WADA Prohibited List
- Global DRO (check a named product)
- USADA (US athletes)
- Operation Supplement Safety (US service members)
The rules you compete or serve under decide this, not this page.
Ergothioneine in other countries
Frequently asked questions
Is Ergothioneine legal in the United Kingdom?
Ergothioneine can be sold in the United Kingdom as a supplement or cosmetic ingredient. Its legal category is "Sold as a supplement". That is not approval as a drug. MHRA has not checked any health claim made for it. Versions you inject, and "research use only" versions, fall outside supplement rules, so that label does not make them legal to use in people. On the evidence, no completed trial in people is cited on its profile (1 human record with no result or no dose given).
Can I buy Ergothioneine in the United Kingdom?
Yes, as a supplement or cosmetic. In the United Kingdom, Ergothioneine has the legal category "Sold as a supplement". So products you swallow, put on your skin or use as a cosmetic can be sold under supplement rules. Versions you inject, and products labeled "research use only", are not supplements. They are not approved for use in people.
Is Ergothioneine MHRA approved?
No. In the United Kingdom, Ergothioneine has the legal category "Sold as a supplement". That is not a MHRA approval to sell it. For comparison, its US FDA status is: Sold as a supplement or food ingredient; not an approved drug. On the evidence, no completed trial in people is cited on its profile (1 human record with no result or no dose given).
Related compounds in the United Kingdom
Full research profile
How Ergothioneine works, the studies we cite, FDA status and the full legal summary are all on its compound profile.
Ergothioneine profileThis page is general information about the legal status of Ergothioneine in the United Kingdom, current as of Sep 2026. It is not legal advice. Legal status changes. For your own situation, check with Medicines and Healthcare products Regulatory Agency or ask a lawyer. Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use. Sellers named on the price pages are ranked by certificate tier, then price, and any affiliate income is disclosed there. Naming a seller is not a recommendation to buy or use anything.