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Ingredient dictionary

Natural rye sourdough on a food label: it contains gluten

Natural rye sourdough is a kind of natural sourdough. It contains gluten, so the allergen labelling rules apply. Whether it is vegan depends on how it was made.

By Bravoora teamUpdated Sources checked 6 sourcesHow we check

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Natural rye sourdough=gluten

Does natural rye sourdough contain an allergen?

Yes. Natural rye sourdough is made from a cereal containing gluten: labels in the UK, Europe and the Gulf must declare it. In the US it is not a listed allergen, because US labels name wheat only.

AllergenUSUK and EuropeGulf
Cereals containing glutenPartlyWheat onlyRequiredWheat, rye, barley, oats, spelt, khorasanRequiredWheat, barley, oats, rye, spelt

Read the gluten guide

Is natural rye sourdough vegan?

It depends on the make. Some kinds of natural rye sourdough are made with an animal product and a label rarely says which, so a vegan profile gets Heads up. It is vegetarian.

VeganHeads upSome kinds are made with an animal product, and a label rarely says which.
VegetarianFits youNot meat or fish.
Coeliac or gluten-freeNot for youIt is made from a cereal containing gluten.

A pack can differ from the usual recipe: the app reads the label in your hand.

What other names does natural rye sourdough have on a label?

On European labels it is “pasta madre di segale naturale” in Italian, “naturalny zakwas żytni” in Polish and “naturlig rugsurdej” in Danish.

Italian
pasta madre di segale naturale
Polish
naturalny zakwas żytni, zakwas naturalny żytni
Danish
naturlig rugsurdej

Which foods contain natural rye sourdough?

Open Food Facts lists natural rye sourdough in the ingredients of 11 products, most often bread and ready meals. Most of them are sold in Poland.

  • Bread10
  • Ready meals1

Products with it, by country of sale: Poland 11.

Counted on 13 October 2026 from the Open Food Facts product database, which volunteers fill from real packs: it shows where natural rye sourdough turns up, not how much of the market it is.

What kind of ingredient is natural rye sourdough?

In the Open Food Facts ingredient tree, natural rye sourdough sits under natural sourdough and rye sourdough.

Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dietitians, doctors and trainers

Sources

An allergen is stated only when two of three checks agree: the Open Food Facts record, Bravoora’s label checker, and the ingredient’s own name or family (oat flour is oats, a cheese is milk). Every name where they disagree waits for a person to review it.

  1. Open Food Facts: Natural rye sourdough
  2. Open Food Facts: ingredients taxonomy (names, family tree, allergen and vegan flags), ODbL
  3. Open Food Facts: product database, 4,535,553 products, read 13 October 2026, ODbL
  4. European Union: Regulation 1169/2011 on food information to consumers, Annex II
  5. UK Food Standards Agency: Allergen guidance for food businesses (the 14 allergens)
  6. US FDA: Questions and Answers Regarding Food Allergen Labeling, Edition 5 (January 2025)

Contains information from Open Food Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check

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