What is E623?

Calcium diglutamate, sometimes abbreviated CDG and also called calcium biglutamate, is a compound with formula Ca(C5H8NO4)2. It is a calcium acid salt of glutamic acid. E623 sits in the E600–E699 series, which in the EU classification mainly covers flavour enhancers.

What is E623 used for?

E623 belongs to the flavour enhancers group. Flavour enhancers such as monosodium glutamate (E621) bring out taste. They are approved, though some prefer to limit them.

Is E623 safe?

E623 is rated “moderate”. It is approved for use in food, but some people prefer to limit it. “Moderate” means it is approved, but is debated or something some people prefer to limit.

How E623 appears on labels

On food packaging you'll find E623 either as the number “E623” or by the name “Calcium diglutamate” 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 E623 vegan?

Yes, E623 is suitable for vegans.