NMN in the UK: novel food status and the 2026 EFSA opinion
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In Great Britain, NMN is classed as a novel food, and an application for it is being assessed by the Food Standards Agency (FSA). In the EU, the European Food Safety Authority (EFSA) published a safety opinion in 2026 that found NMN safe for adults at up to 300mg a day, excluding pregnant and breastfeeding women. EFSA's opinion does not decide the position in Great Britain, which rests with the FSA.
Where NMN stands, in one table
| Where | Status | What it means for you |
|---|---|---|
| Great Britain | Classed as a novel food. Application being assessed by the FSA. | The FSA has not yet published its decision. Watch for an FSA announcement. |
| European Union | EFSA published a safety opinion in 2026. | EFSA found NMN safe for adults at up to 300mg a day, as a source of niacin, excluding pregnant and breastfeeding women. |
| Health claims in Great Britain | None authorised for NMN. | No seller in Great Britain can lawfully tell you what NMN does in your body. |
What "novel food" means
A novel food is one that was not eaten to a significant degree in the UK or the EU before May 1997. NMN occurs in small amounts in foods such as broccoli, cabbage and edamame, but as a concentrated supplement it falls under the novel food rules. In Great Britain those rules are run by the FSA, and in the EU by the European Commission with EFSA giving the scientific advice.
What the 2026 EFSA opinion found
EFSA assessed β-NMN for use in food supplements at up to 300mg a day for adults. It found no concern for genotoxicity, judged the safety margin sufficient, and concluded NMN is safe at that level for adults, excluding pregnant and breastfeeding women. It also concluded that NMN is a source of nicotinamide, a form of niacin.
300mg is the amount EFSA was asked to assess, not a finding that more is unsafe. Our Pure NMN is 500mg a capsule and we say so on the label. Our guide to NMN side effects covers the human trials, including those that used higher doses.
Why NMN sellers cannot tell you what it does
In Great Britain, a supplement can only make health claims that are on the government's register of authorised claims. NMN has none. That is why our product pages list dose, purity, testing and ingredients, and say nothing about effects. If you see a UK seller promising energy, anti-ageing or better sleep from NMN, that is a claim they are not allowed to make, and a reason to be careful about what else they say.
What to check when you buy NMN in the UK
Look for the NMN amount per capsule on the label, a recent certificate of analysis, and a report from a named independent laboratory. Ours are on our lab results page, and our guide to checking whether your NMN is what the label says lists the red flags.