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Why allergens have three states

Between “contains” and “free from” lies “may contain”; keeping it apart from “not filled in” decides whether menu data can be trusted.

admin
1–2 minutes

In an allergen table the commonest error is not a wrong entry but reading “not filled in” as “free from”. If a dish is not marked for peanuts, has someone confirmed it has none, or has no one looked? In a table of tick-boxes the two cases look the same.

So in the dish library each allergen takes one of three states: contains, may contain, free from. “May contain” covers cross-contact — the same wok, the same fryer. Beside the state there is its origin: declared by the restaurant, or inferred from the recipe.

Declaration over inference. An inference is only a hint. It is shown to guests as declared only after the restaurant has confirmed it.

Field definitions are in the data standards.

Cite this entry

GB/T 7714

admin. Why allergens have three states[EB/OL]. DISHES, (2026-10-10)[2026-10-25]. https://dishes.reresearch.org/en/allergen-three-states-en/.

APA

admin. (2026, October 10). Why allergens have three states. DISHES. https://dishes.reresearch.org/en/allergen-three-states-en/

BibTeX
@online{admin20267a97,
  author       = {admin},
  title        = {Why allergens have three states},
  organization = {DISHES},
  date         = {2026-10-10},
  url          = {https://dishes.reresearch.org/en/allergen-three-states-en/},
  urldate      = {2026-10-25}
}

The access date is today's date; entries are revised, so always give the date you accessed them.

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