Are E627 and E631 halal?

Quick answer: E627 (disodium guanylate) and E631 (disodium inosinate) are mushbooh unless the source is stated. Most large-scale production is by fermentation, but E631 can also be extracted from meat or fish, and the label does not say which. A halal certificate on the product settles the question.

E627 and E631 are flavour enhancers, usually used together with MSG in instant noodles, snacks, soups and seasoning mixes. The source is not on the label, which is why they are doubtful.

Why this verdict

• Wikipedia notes that disodium inosinate (E631) can be made by fermenting sugars such as tapioca starch, or extracted from meat or fish, and that large-scale production is mainly through bio-fermentation. It reports that the Vegetarian Society says animal-based production is more common, while the Vegetarian Resource Group says the three leading manufacturers use fermentation.
• Wikipedia says disodium guanylate (E627) is mainly produced by bio-fermentation by major manufacturers. It is usually used together with E631 and with monosodium glutamate, and the pair is sold as E635.
• Neither code appears with a source on the label, so a shopper cannot tell a fermentation-derived ingredient from an animal-derived one, which makes both mushbooh.
• They appear in instant noodles, potato chips and other snacks, savoury rice, tinned vegetables, cured meats and packaged soup, so check seasoning sachets as well as the main product.
• Some halal guides say E631 is often from fish or meat, and some manufacturers say their E631 is plant-derived (for example from tapioca). These claims are not from a certifier, so the product-level answer matters more than the code.
• A halal certificate from a recognized body, or written confirmation from the manufacturer that the ingredient is fermentation-derived, settles it. This is not a religious ruling; ask a qualified scholar if you are unsure.

Key ingredients

• Disodium guanylate (E627)
• Disodium inosinate (E631)
• Disodium 5'-ribonucleotides (E635)
• Often alongside monosodium glutamate (E621)

Halal-friendly alternatives

• Instant noodles and snacks carrying a halal certification mark.
• Seasoning made from named plant ingredients with no E627, E631 or E635.
• Home-made stock and seasoning with salt, herbs and spices.

E627 and E631 (flavour enhancers): common questions

Also relevant

• Halal ingredient guide

How this verdict was reached

Every verdict in the Is it Halal? library follows the same method. We start with the manufacturer's published ingredient statement, then trace each questionable component back to its source — animal, plant, synthetic, or microbial — because the halal status of an ingredient almost always depends on origin rather than on the ingredient name itself. Where the source is ambiguous, we look for certification records, supplier disclosures, and the positions taken by recognised halal certifying bodies, including IFANCA, the Halal Food Authority, and HMC. Country-specific certifiers such as JAKIM (Malaysia) and BPJPH/MUI (Indonesia) are covered in the country certification guides.

We then weigh the mainstream positions of the four Sunni schools of jurisprudence. Where scholars agree, we state the verdict plainly. Where they differ, we label the item mushbooh (doubtful) rather than forcing a single answer, and we explain what each position rests on so you can follow the ruling you observe. Formulations also change between countries and production runs, so a product that is halal in one market may not be in another.

This page is reviewed and updated as manufacturers reformulate and as new certification information becomes available. It is general guidance for everyday shopping, not a religious ruling for your specific situation — if a product matters a great deal to you, confirm with the manufacturer or your local scholar. For anything on the shelf that isn't covered here, our halal scanner app SafaScan is coming soon to iOS and Android; until then, you can browse the full halal verdict library for related ingredients.