Vegan

E621 is classified as vegan by the local ingredient taxonomy.

Names you may see on a label

글루탐산 나트륨Glutaminian monosodowyGlutaminian soduGlutaman sodnýGlutamát sodnýL-glutamát sodný monohydrátGlutasolL-glutaman sodnýL-Glutaman sodný monohydrátL-glutamát sodnýGlutamanGlutamátGlutamate monosodiqueglutamate de sodiummonoglutamate de sodiummonosodium glutamatesodium glutamateC5H8NNaO46106-04-3142-47-2GlutamateMononatriumglutamatNatriumglutamatMonosodiumglutamatSmaksaltWeijingMononatriumglutamaatNatriumglutamaatVetsinVe tsin

How to verify it

Check that the name refers to this exact ingredient and not a similar additive with a different source.