Disodium guanylate is a food additive. Below are all the products whose label lists it, ordered just like the other lists.
Disodium guanylate (E627) – flavour enhancer. Disodium guanylate, a flavour enhancer often used together with MSG.
Source: EU register of food additives (Reg. (EC) No 1333/2008) and EFSA.