Ingredient · E401

Sodium alginate

Source
Not animal-derived
Allergen
No
Role in food
Sodium alginate is primarily used as a thickener, stabiliser, and gelling agent in the …

What is Sodium alginate?

Sodium alginate is a salt derived from alginic acid, a polysaccharide found in brown seaweed. It is produced by treating brown seaweed with sodium carbonate, which extracts the alginic acid, followed by reaction with a sodium compound. It is commonly used as a food additive.

Is Sodium alginate vegan?

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

Is Sodium alginate gluten-free?

It is not a source of gluten.

Is Sodium alginate a major allergen?

Sodium alginate is not derived from any of the 14 major allergens that UK law requires to be emphasised on food labels.

What is Sodium alginate used for?

Sodium alginate is primarily used as a thickener, stabiliser, and gelling agent in the food industry.

Is Sodium alginate safe?

Sodium alginate is authorised as a food additive in Great Britain and is listed on the Register of Food Additive Authorisations.

Why it's used

Sodium alginate is primarily used as a thickener, stabiliser, and gelling agent in the food industry. It helps to improve the texture and consistency of products like desserts, yogurts, and ice cream, and is also used in noodles and pastries to achieve a desired mouthfeel.

Health notes

Sodium alginate is authorised as a food additive in Great Britain and is listed on the Register of Food Additive Authorisations. It has been evaluated by EFSA, which has assessed its safety. At typical levels of consumption found in food, it is generally considered to have no adverse health effects. It is a source of fibre, which can contribute to digestive health.

Regulatory status

Authorised in Great Britain (FSA register): England, Scotland, Wales. FSA register of authorised products

Permitted uses in the EU

Sodium alginate · legislation: 2025-2058

Food categoryMaximum level
1.6.1 unflavoured pasteurised cream (excluding reduced fat creams)No numerical limit listed
4.1.2 peeled cut and shredded fruit and vegetables2400
8.2 Meat preparations as defined by Regulation (EC) No 853/2004No numerical limit listed
13.1.3 Processed cereal-based foods and baby foods as defined by Regulation (EU) No 609/2013500
13.1.5.1 Foods for special medical purposes as defined by Regulation (EU) No 609/2013, intended for infants1000
13.1.5.2 Foods for special medical purposes, as defined by Regulation (EU) No 609/2013, intended for infants as from four months of age and for young children1000

Maximum levels are shown as published (mg/kg or mg/l, depending on the food). Some entries carry extra conditions and group authorisations are not listed here, so check the full entry before relying on a figure.

Substance is included in E 400 - 404, see also authorisation for Group E 400 - 404 Substance is included in Group I, see also authorisation for Group I

Sources: Food Standards Agency (OGL v3); European Commission, Food Additives Database.

Allergen info

Sodium alginate is not derived from any of the 14 major allergens that UK law requires to be emphasised on food labels. It is not a source of gluten.

Foods that contain Sodium alginate

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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.