When I was in college, I developed stomach problems, which were identified as irritable bowel syndrome (also known as spastic colon, but not to be confused with inflammatory bowel disease (Ulcerative Colitis and Crohn’s Disease).  If I ate a lot of roughage, Chinese food, or drank black coffee, within no more than a half an hour, I would find myself needing to find a bathroom right away.  While it hindered my social life, it also may have been the start of my immune system problems.

I...