Ingredient

Leek

Source
Not animal-derived
Allergen
No
Role in food
Leeks are used in food manufacturing primarily for their mild onion flavour and to …

What is Leek?

The leek is a vegetable related to the onion and garlic, belonging to the allium family. It has a mild, sweet onion flavour and a distinctive texture. Leeks are grown in temperate climates worldwide and are typically eaten cooked, often featuring in soups, stews, and gratins.

Is Leek vegan?

Leek is not animal-derived. Products that contain it can still include other animal-derived ingredients, so check the full ingredient list.

Is Leek gluten-free?

They do not contain gluten.

Is Leek a major allergen?

Leeks are not one of the 14 major allergens that must be emphasised on UK food labels.

What is Leek used for?

Leeks are used in food manufacturing primarily for their mild onion flavour and to add texture and bulk to savoury dishes.

Is Leek safe?

Leeks are a whole food and not a food additive.

Why it's used

Leeks are used in food manufacturing primarily for their mild onion flavour and to add texture and bulk to savoury dishes. They are a common ingredient in vegetable soups, ready meals, and sauces, contributing a subtle, sweet allium taste without the pungency of raw onions.

Health notes

Leeks are a whole food and not a food additive. They are a source of fibre, vitamins, and minerals. As part of a balanced diet, vegetables like leeks contribute to overall health.

Allergen info

Leeks are not one of the 14 major allergens that must be emphasised on UK food labels. They do not contain gluten.

Foods that contain Leek

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Auto-generated content. This description was generated automatically and is pending editorial review. Inaccuracies are possible. Found a mistake? Contact us.

Last updated: 17 October 2026

Note: This site presents label data from Open Food Facts for general information. It is not medical advice. Check the package label; formulations change.