What is E631?
E631 is Disodium inosinate, a flavour enhancer. Can be made from meat (including pork) or fish. Halal if the product is vegan/vegetarian-labelled or certified.
Also written as: INS 631, E-631, E 631. INS is the international numbering system used outside Europe, including on labels in Asia, Australia and the Middle East.
What to do
Look for a halal logo, a "vegan" label, or a stated plant source on the pack. If none of these are present, you can contact the manufacturer and ask for the source.
Frequently asked questions
Is E631 halal?
E631 (Disodium inosinate) is doubtful (mushbooh). Can be made from meat (including pork) or fish. Halal if the product is vegan/vegetarian-labelled or certified.
What is E631 made from?
Meat or fish, or fermentation.
What is E631 used for?
E631 is used as a flavour enhancer, typically in crisps, instant noodles, stock cubes and ready meals.
What should I do if a product contains E631?
Look for a halal logo, a "vegan" label, or a stated plant source on the pack. If none of these are present, you can contact the manufacturer and ask for the source.
Related E-numbers
Last reviewed 2026-10-06. How we decide · Suggest a correction