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Milk

Milk is entry 7 of the fourteen substances Annex II of Regulation (EU) No 1169/2011 makes declarable. IgE or non-IgE allergy to milk protein — separate from lactose intolerance, which is an enzyme problem. Where it hides, which exemptions apply, and what it cross-reacts with.

This is reference information, not a diagnosis and not a treatment plan. A pollen calendar cannot tell you what you are allergic to, and no page can clear a food as safe for you — only the label on the packet in your hand and the clinician who knows your history can do that. Anything beyond mild, short-lived symptoms in the mouth or nose — swelling that affects breathing or swallowing, hives away from the mouth, wheeze, vomiting or faintness — is an emergency question, not a reading question.

What the law says

Annex II, entry 7: “Milk and products thereof, including lactose”

That wording carries the whole obligation. The substance must be declared whenever it is used in the making of a food and is still present in the finished product, even in an altered form, and it must be picked out inside the ingredient list by typeset — bold, capitals, italics, underlining or a contrasting colour. There is no legal requirement for a separate allergen box, so the ingredient list is where to look.

Source: Regulation (EU) No 1169/2011, Annex II and Article 21 · checked 2026-09-06

What the reaction actually is

Cow's milk protein allergy is the most common food allergy of infancy. The proteins split into caseins, which survive heat well, and whey proteins such as beta-lactoglobulin, which do not. There is also a non-IgE form presenting with vomiting, reflux, blood in the stool and poor growth rather than hives, which is diagnosed by supervised elimination and reintroduction rather than by a skin prick test.

Who gets it, and does it last

Most children outgrow milk allergy, and the usual reintroduction ladder starts with baked milk in a biscuit or cake, where the whey proteins have been denatured. Children whose allergy is casein-driven progress more slowly. This is a clinician-led process.

Where it hides

• Bread, brioche and many pastries
• Crisps and flavoured snacks
• Processed meat and sausage
• Margarine and spreads
• Instant soups and sauce powders
• Some medicines and supplements using lactose as a filler
• Ghee and butter oil

One regional fact is worth stating plainly: Northern Europe has the highest rate of adult lactase persistence in the world, so lactose intolerance is comparatively uncommon in native Nordic and Baltic adults, whereas lactose-free products are unusually widely stocked. That combination makes it easy to assume that "lactose-free" solves a milk problem, and for milk protein allergy it does not.

Cross-reactions

Goat and sheep milk proteins are close enough to cow that they cross-react almost completely and are not substitutes. Reactions to beef occur in a minority. Human breast milk is not affected, though a small number of infants react to cow's milk protein passing into it.

The labelling detail

Milk is entry 7 and it explicitly includes lactose, so lactose used as a carrier or filler is declarable. The two exemptions are narrow: whey going into distilled alcohol, and lactitol.

Exempt from declaration under Annex II:

• Whey used for making alcoholic distillates, including ethyl alcohol of agricultural origin
• Lactitol

Precautionary wording — “may contain”, “made in a factory that also handles” — is a separate matter: it is voluntary, unstandardised and carries no threshold. How strictly to treat it is a clinical decision, not a reading of the label. The labelling explainer sets out the whole frame, including what happens in restaurants and bakeries where there is no pack at all.

What gets misread

Lactose-free milk still contains every milk protein and is dangerous for milk allergy. "Dairy-free" and "plant-based" are marketing terms with no legal definition, unlike the declared allergen itself. And a milk-free diet in a child is a nutritional intervention that needs dietetic input, not a supermarket decision.

Sources: Regulation (EU) No 1169/2011, Annex II · Commission Implementing Regulation (EU) No 828/2014 (gluten claims) · WHO/IUIS Allergen Nomenclature · season windows from the national aerobiology monitoring programmes of Estonia, Finland, Sweden, Denmark and Norway · cross-reaction patterns paraphrased from the allergy literature and EAACI material · checked 2026-09-06

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