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Disodium Guanylate is permitted by the US FDA. Several countries restrict, warning-label, or have reviewed it for safety concerns. The US has more lenient additive rules than the EU, UK, Canada, and Japan, which is why this ingredient remains widely used here.
Considered safe at food use levels. As a purine nucleotide, it raises the same gout/hyperuricemia concerns as disodium inosinate. Commercial disodium guanylate is often derived from fish (sardines) or yeast, making it non-vegan and non-vegetarian in most commercial applications. People with gout should be aware of cumulative purine intake from these additives.
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