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E627/E631/E635 — Flavour ribonucleotides

Flavour enhancers (disodium guanylate E627, disodium inosinate E631, and their blend E635) that boost savoury umami taste, usually alongside MSG.

Allergen connection

E631 in particular can be produced from fish (sardines) as well as from tapioca fermentation. Labels rarely say which. For strict fish avoidance, treat unexplained E631/E635 in savoury snacks as a question for the manufacturer.

🐟 Fish

Where you'll see it

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Scallergy checks ingredient lists — including allergen-derived additives and hydrolysed proteins — against your personal allergen profile, and tells you honestly when data is missing.

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Scallergy is assistive, not medical advice. Additive sourcing varies by manufacturer — when the source matters for a severe allergy, confirm with the producer and your allergist. Sources: EU Regulation 1169/2011; our data sources.

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