From what I've read, caffeine in general is a bad idea for anyone with UC as it's a stimulant that can irritate an already sensitive gut. Coffee, in particular, is known to be irritating to the colon. As kb5 says, alot of folks use it as a stimulant to make them have a bowel movement. It's on the "do not eat" list of several IBD books I have. Of course, there are always individual exceptions to the rule, but since you're not already a coffee lover, I don't see any benefit in drinking it now.
Diagnosed with ulcerative colitis spring 1999