What is E333?

Calcium citrate is the calcium salt of citric acid. It is commonly used as a food additive (E333), usually as a preservative, but sometimes for flavor. E333 sits in the E300–E399 series, which in the EU classification mainly covers antioxidants and acidity regulators.

What is E333 used for?

E333 belongs to the antioxidants group. Antioxidants stop fats going rancid and food discolouring. Several are natural, such as ascorbic acid (vitamin C).

Is E333 safe?

E333 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 E333 appears on labels

On food packaging you'll find E333 either as the number “E333” or by the name “Calcium citrates” 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 E333 vegan?

Yes, E333 is suitable for vegans.