For me its Pastries. I love the pound bakery, pasties, pecan plaits, etc but Ohhhmylord they are deadly. within an hour I'm feeling like I have an ulcer about to burst or something equally dramatic.
LOTS and lots of things make my stomach / gut react dreadfully, but just wondered if anyone else had something similar. I'm waiting on a biopsy to confirm, and oddly enjoying the fact that I HAVE to eat these things I love at the moment, before saying goodbye to them once diagnosed.