Flavour enhancer

Is E635 (flavour enhancer 635) halal?

Uncertain The source can vary. This one needs checking before you trust it.

E635 is uncertain. It is a mix of E627 (disodium guanylate) and E631 (disodium inosinate), which can be made from meat or fish extract or by fermentation. MUIS lists it as syubhah and SANHA as mushbooh.

Also known as / other names

disodium 5'-ribonucleotidesdisodium ribonucleotidesI+GE 635flavour enhancer 635

Last reviewed 2026-10-24.

What E635 (disodium ribonucleotides) actually is

E635 is a flavour enhancer that boosts savoury taste. It is often sold as I+G and used together with MSG (E621) in crisps, instant noodles, stock cubes and seasonings.

It is a blend of two nucleotides, E627 and E631. These can be extracted from meat or fish, or made by fermentation.

Why it is uncertain

MUIS (Singapore) lists E635 as syubhah because it can come from meat extract or sardines. SANHA lists it as mushbooh. When the source is meat, it could be from pork, and the label does not say.

Both of its parts, E627 and E631, are marked uncertain in our table for the same reason.

How to check it yourself

  • A vegan mark rules out meat and fish sources.
  • A halal certificate means the source has been confirmed.
  • Otherwise, ask the manufacturer whether their E635 is made by fermentation.

Where you'll run into it

Crisps and flavoured snacks, instant noodles, stock cubes and seasoning mixes, ready meals and soups.

Common questions

Is E635 the same as MSG?

No. MSG is E621. E635 is a different flavour enhancer, often used next to MSG because together they taste much stronger.

Sources

Best-effort guidance compiled from sourced references — not a religious ruling and not a certification. Schools of thought differ, and manufacturers change formulations without notice. Please verify with the producer or your local authority when it matters. How we decide a verdict.

One ingredient down.

E635 (disodium ribonucleotides) is one line on the label. A typical label lists thirty more. Point the camera and the app checks every one of them in about three seconds — free, no account, and it works offline in the aisle where the signal doesn't.