Flavour Enhancer 635 and Vegetarian The flavour enhancer E635 is a combination of E627 (disodium guanylate) and E631 (disodium inosinate) and is in Fantastic Noodles (Chicken).

If I am correct, the flavour enhancer 627 is isolated from sardines and/or yeast extract and 631 can be prepared from meat extract and/or dried sardines. If 635 is made out of 627 and 631, is it considered vegetarian as 627 and 631 contain sardines and/or meat extract?

If not, does this make the noodles non-vegetarian?
E627 can be produced from seaweed, and 631 may be produced from tapioca starch.

Thus, both may be properly vegan. Or not. What does it make the food? With all honesty, it makes food don't know category. You can't assert it's vegan, and you can't be sure it isn't. If you are going to feed your vegan friends, buy ingredients with guaranteed vegan origin. If you don't know, be sensible to inform your friends you don't know.

If you are vegan yourself, only you can tell if you are willing to risk eating non-vegan ingredients when source wasn't stated explicitly.