Good to know. My doctor suspected that I might have ulcerative colitis, but luckily it was not the case. I was highly symptomatic due to my incredibly poor lifestyle habits that I described elsewhere in this thread, so suspecting that I might suffer from UC/Crohn's disease wasn't completely out of left-field.
jessriedel is correct. That's true of most cases. Alas, not mine.
Interesting view, jperras. For me the caffeine changed loomed largest, partly because it was a nearly continuous part of my day. Eating meals was a handful of hours; ditto adding exercise. But I usually had coffee/soda to hand.