I occasionally use it on toast, but that's about it. Same goes with all the derivations, such as Marmite, Promite etc. It's an addition to something else, and quite vile on its own. Nobody would even begin to think of putting something like this on the market, today, if there hadn't been any such product before.... It would fail faster than Dr Pepper in this country.
And nobody is admitting that the only reason we have Vegemite in the first place is because there were a lot of yeast castoffs from breweries in this country, and that there were a lot of breweries in the first place.
And as for food labelling.... If you see "Colour 102" on a product, avoid it like it was Black Death. This is a chemical that has no right to be in a foodstuff in the first place, and in equal quantities will do more damage to your brain than alcohol. Actually, in equal quantities it will just kill your nervous system outright.