Not sure if that's true, there's some frozen supermarket pizza now that's seriously good. If I ordered fast food and they delivered a freshly baked Crosta Mollica pizza I wouldn't send it back. Of course a fresh pizza is better, but imo you couldn't get a Crosta Mollica quality frozen pizza 10 years ago.

Perhaps MSG. Seems to have been proven harmless, but leads to overeating, in my case.I"m not giving it up, I can't eat veggies without it :)