E631: Disodium inosinate

What is E631?

Disodium inosinate is the sodium salt of inosinic acid, a nucleotide that occurs naturally in meat and fish. Labelled E631, it has little taste of its own but strongly boosts savoury, umami flavour.

Origin and production

It is commonly produced by bacterial fermentation, but it can also be made from meat or fish extracts; labels rarely say which.

Why is it used?

Disodium inosinate is a flavour enhancer that works in synergy with monosodium glutamate, so only small amounts are needed. It is often combined with disodium guanylate (as E635) and appears in crisps and snacks, instant noodles, soups, stock cubes, sauces and seasonings.

Vegan, vegetarian and halal

Because it may be made either by fermentation or from meat or fish, it is not automatically vegan or vegetarian. Vegans, vegetarians and people following halal or kosher rules should look for a certified product or contact the manufacturer about the source.

Safety and regulation

Disodium inosinate is authorised as a flavour enhancer in the EU and has been evaluated by EFSA and the international expert committee JECFA. It is generally not permitted in foods intended for infants and young children.

Common in