What is E401?

Alginic acid, also called algin, is a naturally occurring, edible polysaccharide found in brown algae. It is hydrophilic and forms a viscous gum when hydrated. E401 sits in the E400–E499 series, which in the EU classification mainly covers thickeners, stabilisers and emulsifiers.

What is E401 used for?

E401 belongs to the thickeners group. Thickeners and gelling agents give food texture and body. Many come from plants, like pectin and guar gum.

Is E401 safe?

E401 is considered safe at the levels used in food and is approved for use in the EU. “Safe” means it is approved in the EU and regarded as safe at the levels used in food.

How E401 appears on labels

On food packaging you'll find E401 either as the number “E401” or by the name “Sodium alginate” in the ingredient list, often after its function. Ingredients are listed in descending order by weight, so an additive near the end is present only in small amounts.

Is E401 vegan?

Yes, E401 is suitable for vegans.