Ingredient dictionary
Onion on a food label: allergens, diets and other names
Onion is a kind of onion-family vegetable. It is not one of the allergens that labels must declare. It is vegan. Open Food Facts finds it in 151,457 products, most often in ready meals. Per 100 g: about 39 kcal and 1.1 g protein.
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Does onion contain an allergen?
Onion is not one of the allergens that food labels must declare in the US, the UK, Europe or the Gulf. Open Food Facts does not link it to an allergen, and Bravoora’s label checker does not read the name as one.
Is onion vegan?
Yes. Onion is vegan and vegetarian: Open Food Facts records nothing from an animal in it.
A pack can differ from the usual recipe: the app reads the label in your hand.
What other names does onion have on a label?
In English onion can also read “onions”. On European labels it is “oignon” in French, “Zwiebel” in German and “cebolla” in Spanish. The other 13 languages are listed below.
- French
- oignon, oignons
- German
- Zwiebel, Zwiebeln
- Spanish
- cebolla, Cebollas
- Italian
- cipolla, Cipolle
- Dutch
- ui, uien
- Portuguese
- cebola
- Polish
- cebula, cebuli
- Swedish
- lök, lökar
- Danish
- løg
- Norwegian
- løk, løker
- Finnish
- sipuli, sipulit
- Czech
- cibule
- Hungarian
- hagyma, hagymák
- Romanian
- ceapă, ceapa
- Croatian
- luk, crni luk
- Turkish
- soğan
Which foods contain onion?
Open Food Facts lists onion or a more specific kind of it in the ingredients of 151,457 products, most often ready meals, dressings and sauces and savoury snacks. Most of them are sold in the United States, France and Germany.
Products with it, by country of sale: United States 64,144 · France 38,467 · Germany 14,011 · United Kingdom 11,115.
Counted on 13 October 2026 from the Open Food Facts product database, which volunteers fill from real packs: it shows where onion turns up, not how much of the market it is.
How many calories are in onion?
Onion has about 39 kcal per 100 g, with 1.1 g protein, 6.3 g carbohydrate and 0.6 g fat. The figures are for the entry “Onion, raw” in CIQUAL, the French food composition table published by ANSES.
Also per 100 g: sugars 4.8 g, saturated fat 0.2 g, fibre 1.7 g, salt 0.1 g, energy 162 kJ.
ANSES CIQUAL table, CALNUT 2020 edition, food code 20034. A product’s own nutrition panel is the figure to log.
What kind of ingredient is onion?
In the Open Food Facts ingredient tree, onion sits under onion-family vegetable and root vegetable.
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.
- Open Food Facts: Onion
- Open Food Facts: ingredients taxonomy (names, family tree, allergen and vegan flags), ODbL
- Open Food Facts: product database, 4,535,553 products, read 13 October 2026, ODbL
- ANSES: CIQUAL French food composition table (CALNUT 2020 edition), Licence Ouverte 2.0
- Wikipedia: Onion
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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