Doctor House just got his test results back

Some of you are right... The pizza is what caused Doctor House to feel sick. The real question though, is, is it the crust, the sauce, or the cheese that made him sick? Doctor House also figured out there is another item that makes him sick. He won't release any information about that item, but all he can say is that it is similar to an item that is used to make pizza. Hmmm? Confused? I think i am.