What is E628?

Dipotassium guanylate is a compound with formula K2(C10H12O4N5PO4). It is a potassium salt of guanylic acid. E628 sits in the E600–E699 series, which in the EU classification mainly covers flavour enhancers.

What is E628 used for?

E628 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 E628 safe?

E628 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 E628 appears on labels

On food packaging you'll find E628 either as the number “E628” or by the name “Dipotassium guanylate” 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 E628 vegan?

No, E628 is animal-derived and not suitable for vegans.