What this article is and is not
This is a description of a labelling regime. It sets out what businesses are required to declare, in what form, and where the boundaries of the obligation fall.
It is not clinical guidance and contains none. Nothing here should be used to decide whether a food is safe for a person with an allergy or intolerance. That is a matter for the individual, their GP and their specialist, and the NHS publishes information written for that purpose. What follows describes the information system, not what to do with it.
The fourteen
Food information law names fourteen allergens that must be declared when used as an ingredient or a processing aid that remains in the finished food. They are cereals containing gluten, crustaceans, eggs, fish, peanuts, soybeans, milk, nuts of the specified tree nut types, celery, mustard, sesame, sulphur dioxide and sulphites above a defined threshold, lupin and molluscs.
Two features of the list are worth noting. It is a closed list, so an ingredient that causes reactions in some people but is not on it carries no specific emphasis obligation. And it is defined by ingredient rather than by severity, so the obligation is identical for every entry regardless of how commonly or how seriously each is implicated.
Declaration and emphasis
The requirement has two parts and both matter. The allergen must be declared, which means it must appear in the ingredients list, named in a way that makes the allergen clear. And it must be emphasised, which means it must be distinguished from the rest of the list by a typographical means such as bold type, capitals, contrasting colour or underlining.
This design has a specific consequence. A compliant pack does not carry a separate allergen box as a legal requirement. The information lives inside the ingredients list, which is why the list rather than any summary panel is the definitive place to look.
Voluntary summary statements do appear, often beginning with the word contains, and they can be helpful. But they are additional, they must not contradict or replace the declaration in the list, and a shopper relying on a summary alone is relying on something that is not the primary record.
| Statement | Status | What it rests on |
|---|---|---|
| Emphasised allergen in the ingredients list | Required | Food information law, for the fourteen named allergens |
| Contains summary near the list | Voluntary | Permitted addition, must not contradict the list |
| May contain or similar wording | Voluntary | Business risk assessment, no prescribed form or threshold |
| Gluten-free wording | Controlled | Specific rules with defined thresholds |
| Other free from wording | Claim | General prohibition on misleading information, plus the business's own controls |
| Allergy alert on a recalled product | Regulatory action | Published by the Food Standards Agency after an incident |
Structure set out by this newsroom from the published rules named in the sources below. It is not a survey, a measurement or a market study.
What changed in 2021
Before October 2021, food that was packed on the same premises from which it was sold sat in a different category from prepacked food and did not require a full ingredients list on the pack. Allergen information had to be available, but it could be provided in other ways.
The Food Information (Amendment) (England) Regulations 2019, and the corresponding legislation in the other UK nations, changed that. From 1 October 2021, food prepacked for direct sale, generally known as PPDS, requires a label carrying the name of the food and a full ingredients list, with the fourteen allergens emphasised in the same way as on any other prepacked food.
The change is commonly known by the name of the campaign that led to it. Its practical effect is that a very large category of food, the items packed in advance behind a counter or in a chiller in the premises where they are sold, moved from a spoken or on-request information model to a printed one.
Food that is genuinely not prepacked, sold loose or made to order, remains in a different category. Allergen information must be provided, but it may be given in other ways, and the business must make clear how to obtain it. The Food Standards Agency sets out the categories and the corresponding duties.
Precautionary allergen wording
Wording of the form may contain, not suitable for, or made in a facility that also handles is known as precautionary allergen labelling. Its status is different from everything above, and the difference is frequently misunderstood.
Precautionary wording is voluntary. There is no legal requirement to use it, no prescribed form of words, and no defined threshold at which it must appear. Where it is used, the general rule that food information must not be misleading applies, and it should reflect a genuine and unavoidable risk identified through a business's own assessment.
Because there is no standard, the phrases are not a scale. Different wordings on different packs do not represent different levels of risk, and a business that uses no precautionary wording has not thereby stated that no cross-contamination is possible. This is a known weakness in the system and has been the subject of consultation and review work by the Food Standards Agency.
What follows from this for an individual is a clinical judgement, not an informational one, and it belongs with their own healthcare team.
Free from and gluten wording
Statements about the absence of an allergen are governed separately from statements about presence. Wording about gluten content is subject to specific rules with defined thresholds, which is why gluten-free is a controlled term rather than a general description.
Other free from statements about the fourteen allergens are made under the general prohibition on misleading information, supported by a business's own controls and verification. They are claims about the absence of an intentional ingredient and about the management of cross-contamination, and the strength of the claim depends on the systems behind it rather than on the wording itself.
When a declaration turns out to be wrong
Where a product reaches sale with an allergen present but not correctly declared, the response is a recall or withdrawal, and in the case of allergens the Food Standards Agency issues an allergy alert. These are published and searchable, and they are one of the few parts of the food information system that is genuinely real-time.
Alerts are also a useful corrective to a comfortable assumption. Mislabelling happens, generally through packaging errors, supplier changes or artwork mistakes rather than through indifference. The system is designed to catch it after the fact as well as to prevent it, and the alert stream is the visible part of that.
The line, stated once more
Everything above concerns what has to be printed and by whom. It says nothing about what any individual should eat, how to assess a risk, what to do about a reaction, or how to manage an allergy or intolerance. Those questions belong to the NHS, to a GP, to an allergy specialist and to a registered dietitian. This publication covers food information, and stops at the point where the subject becomes clinical.
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