What is E621?

Monosodium glutamate (MSG), also known as sodium glutamate, is a sodium salt of glutamic acid. MSG is found naturally in some foods including tomatoes and cheese in this glutamic acid form, and is used in cooking as a flavor enhancer that intensifies the umami flavor of food, as naturally occurring glutamate does in foods such as stews and meat soups. E621 sits in the E600–E699 series, which in the EU classification mainly covers flavour enhancers.

What is E621 used for?

E621 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 E621 safe?

E621 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 E621 appears on labels

On food packaging you'll find E621 either as the number “E621” or by the name “Monosodium glutamate (MSG)” 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 E621 vegan?

Yes, E621 is suitable for vegans.