Flares wear you out. One reason can be anemia, when your body doesn't have enough healthy red blood cells. If you have long-term, low-level bleeding from your colon’s lining or bloody diarrhea, you may get iron deficiency anemia and need iron supplements. Food sources include lean meats, seafood, spinach, raisins, and fortified breakfast cereals. Egg yolks and artichokes are other options that may be easier on your stomach.