Guanosine
Naturally present in many foods and human metabolism; safety concerns relate primarily to high-purine intake in individuals with gout, not to typical dietary exposure.
What it is
A purine nucleoside composed of guanine and ribose; naturally present in foods and produced commercially for use as a flavor enhancer precursor and supplement.
Naturally occurring nucleoside; the disodium salt of its 5'-monophosphate (disodium 5'-guanylate, E627) is the regulated flavor enhancer rather than the nucleoside itself.
Why it's flagged
- high purine intake may aggravate gout in susceptible individuals
What regulators actually say
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Regulatory status
United States — FDA
Naturally occurring nucleoside; the related additive disodium 5'-guanylate is permitted (21 CFR 172.535)
European Union — EFSA
Naturally occurring; disodium guanylate (E627) authorized under Regulation (EC) No 1333/2008
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