Egg

Most pages on this site exist because a rule has a hole in it. This one exists because a rule does not, and the contrast is worth drawing.

Egg is a major food allergen in the United States and one of the fourteen in Europe. What makes it unusual is what follows.

No exemptions

Several allergens carry carve-outs for derivatives processed far enough that the protein is gone. Wheat-based maltodextrin is exempt. Wheat and barley glucose syrups are exempt. Fish gelatine and Isinglass used to fine beer and wine are exempt.

Egg has none. The Irish food authority’s list of the fourteen allergens records exemptions under cereals, fish, soybeans, milk and nuts, and records none under eggs.

The practical consequence is direct: egg white used to fine a wine has to be declared, where the fish-derived agent doing the same job in the next tank does not. Two processing aids, the same function, opposite treatment, and the reason is that regulators assessed the residues differently rather than that anyone drew a line carelessly.

For a reader with an egg allergy that is unusually good news. The ingredient list, plus the allergen statement, genuinely covers it.

Where the difficulty actually is

Not in disclosure but in vocabulary. Egg appears under a long list of names that do not contain the word.

Albumen is egg white, and it is spelled close enough to “albumin” that both turn up. Ovalbumin, ovomucoid, ovovitellin: the “ovo” prefix is the reliable signal. Globulin and livetin are egg proteins. Lysozyme is an egg-white enzyme used as a preservative in some cheeses and wines, and it is the one most people have never heard of.

Because there are no exemptions, all of these have to trigger an egg declaration wherever allergen rules apply. So the allergen statement is the fast read and the ingredient list is where you find out which form it took.

Vegetarian, vegan and the gap between

Egg is not vegan and it is eaten by most vegetarians, which makes it one of the clearest dividing lines between the two words.

It is also the reason a product marked vegetarian tells a vegan very little. The same logic runs through the page for people avoiding animal ingredients: the words are not legally defined in most markets, and a certification mark carries information the ingredient list does not, particularly about processing aids.

Here, unusually, the ingredient list does carry it. Egg is the case where reading the label works.

Baked egg and the ladder

Many children allergic to egg tolerate it baked into cake or biscuit, because prolonged heat changes the protein structure enough that the immune system stops recognising it.

That is a real clinical phenomenon and it is not a label-reading matter. Introducing baked egg is done under medical supervision, on advice specific to the child, and nothing on a packet indicates whether a given product qualifies. If this is relevant to you, it belongs with your allergy team rather than with a scanner.