Crohn's disease (CD) and ulcerative colitis (UC) are chronic gastrointestinal diseases characterized by relapsing and remitting inflammation of the intestines Anemia may often complicate the course of inflammatory bowel disease (IBD). The cause of anemia in IBD is multifactorial In the chronically ill patients, it has been described that the mechanism underlying anemia involves hepcidin.A potential mechanism underlying anemia during an chronic disease is suggested by recent data demonstrating a hepcidin lowering effect of vitamin D