Literally nothing. If it smells good, I'll eat it.
Honestly there's very few things I won't eat. When I was a teen in the early 2000s my mom and another mom would do fun things for the 10 or so of us that were friends on our street. One of which was a Fear Factor game. I ended up eating a lot of things, culminating in a live fish. I'm not proud of it, but I was the one kid to eat them all just to win. I won like a $5 gas card or something but it is forever immortalized on video.