Diet Plan for Patients of Ulcerative Colitis It is an inflammatory bowel disorder which involving the mucosa and sub mucosa of the large intestine. Symptoms of ulcerative colitis are bleeding, mucous and difficulty in passing stools. Intake of unbalanced diet and heredity play huge role to cause ulcerative colitis. Low – fat, Low – fiber diet is recommended for ulcerative colitis patients because it prevents bleeding while passing stool. This diet is also helpful to prevent ailments like diarrhea, crohn’s