YenzoWhat is E626 (guanylic acid)?
E626 is guanylic acid. In Appendix 1 of Circular 24/2019/TT-BYT the functions listed for it are flavour enhancer.
E626Guanylic acid
E626 is guanylic acid (acid guanylic). In Appendix 1 of Circular 24/2019/TT-BYT its function is flavour enhancer.
- Code
- E626 · INS 626
- Group
- Flavour enhancer
In Vietnam✓ PermittedOn the list of permitted additives — Circular 24/2019, Appendix 1
Risk level on the Yenzo Scalelow?Based on the Open Food Facts additives taxonomy
How E626 appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, flavour enhancer (626), dried onion and garlic, pepper, natural colour (160a).
flavour enhancer (626)flavour enhancer 626E626INS 626On Vietnamese labels: Acid guanylic, 5'-
Guanylic acid in food
Salt substitutes
Questions about guanylic acid
Is guanylic acid harmful?
The JECFA database (the FAO/WHO expert committee) records an ADI of “not specified” (no numerical ADI is needed) for 5'-guanylic acid, evaluated in 1985; this is a group ADI for guanylic acid and its calcium, disodium and dipotassium salts.
Is INS 626 permitted in Vietnam?
Yes. Guanylic acid (INS 626) is listed in Appendix 1 of Circular 24/2019/TT-BYT, the list of additives permitted in food, with the function flavour enhancer.
Other flavour enhancers
E623Calcium diglutamatelowE624Monoammonium glutamatelowE625Magnesium diglutamatelowE627Disodium guanylatelowE628Dipotassium guanylatelowE629Calcium guanylatelow
See all flavour enhancers →Updated 23 October 2026
Sources (3)
- Open Food Facts additives taxonomy (Yenzo's table cites no EFSA opinion for this code). Open Food Facts additives taxonomy, https://github.com/openfoodfacts/openfoodfacts-server/blob/main/taxonomies/additives.txt (entry en:e626)
- Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 2A: mức sử dụng tối đa phụ gia trong thực phẩm
- JECFA (FAO/WHO) evaluation database: 5'-Guanylic acid, INS 626