Low-Fiber Diet

• Fiber is normally an important part of a healthy diet. People with ulcerative colitis, though, should reduce consumption. Eating a large amount of fruits, whole grains and vegetables may cause diarrhea and gas, says the Mayo Clinic. Avoid eating raw vegetables and instead steam them, which makes it easier for your body to digest.
  
  

Foods to Avoid

• With a low-fiber diet, it's important to avoid foods that trigger ulcerative colitis, such as cabbage, broccoli and caffeine. Eating beans and fruit juices that are raw may cause digestive upset. Alcohol and carbonated beverages should also be avoided.
  Eating smaller meals may reduce symptoms, as well, says the Mayo Clinic. Eat six small meals daily instead of three large ones. This is easier on the digestive system and can minimize symptoms of ulcerative colitis.
  
  

Boost Liquid Consumption

• Diarrhea can deplete the body of fluids, which boosts the chances of dehydration. Also, people with this condition have a higher risk of kidney stones, which dehydration can trigger, says the Cohn's & Colitis Foundation of America.
  When drinking fluids, water is the best choice. Drink a half ounce of water for every pound of body weight. For example, if you weigh 150 pounds, 75 ounces should be consumed each day. Also, avoid beverages that stimulate the intestines and cause diarrhea, such as carbonated sodas and alcohol.
  
  

Food Diaries

• A food diary can help isolate problem foods, says the Crohn's & Colitis Foundation of America. When eliminating high-fiber foods from your diet, eliminate one food at a time. In your diary, note which food was eliminated and if symptoms improve. Because each case of ulcerative colitis is a little different, a food diary will help customize your diet, based on the foods that cause you the most sensitivity.
  
  

Get Enough Nutrients

• Diet restrictions can cause vitamin deficiencies, says the Mayo Clinic. Consider taking a vitamin and mineral supplement. But talk with your doctor before taking a supplement. Some supplements can interfere with prescription medications.