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Flavour enhancerINS 635
E635
Disodium 5′-ribonucleotides
What you need to know
Ribonucleotides boost savoury “umami” taste. They are almost always used together with MSG, letting it work at lower levels.
They occur naturally in meat, fish and mushrooms. Regulators consider them low concern.
People who are very sensitive to MSG sometimes report reacting to them too.
Where it stands, by region
The same additive can be approved in one country and banned in another. This is the divergence that matters most.
| 🇦🇺AU / NZ | Approved Permitted; must be declared on the label. |
| 🇪🇺EU | Approved Permitted (EFSA). |
| 🇺🇸US | Approved Permitted (FDA). |
| 🇨🇦CA | Approved Permitted (Health Canada). |
Health evidence
How settled the science is for each area — not how dangerous. “Unknown” means not enough good studies yet.
Hyperactivity & behaviour
Unknown
Allergy & intolerance
Suspected
Gut microbiome
Unknown
Metabolic effects
Unknown
Carcinogenicity
Unknown
Cardiovascular
Unknown
A 1:1 mix of disodium inosinate (E631) and disodium guanylate (E627). JECFA ADI 'not specified'.
Synthesis: Fermentation-derivedADI Not specified (acceptable)