I became a vegetarian when I was 10 years old and was diagnosed with Crohn's aged 20.
There aren't any foods that I've found I'm particularly intolerant to. Only when I'm having a flare all food aggrevatesand when I'm in remission I'm fine with everything.
Being veggie is my choice as I'm really screamish and can't stand the thought of eating blood! I'm sure my body could tolerate it fine (in remission) if I did choose to eat it.