What causes IBD?
At this time, there is no agreed-upon cause for IBD. Approximately 1 million Americans suffer from IBD, with 30,000 new cases diagnosed each year. Both men and women get IBD; teens and adults between 15 and 35 years old are the most susceptible. In fact, 10 percent to 20 percent of people with IBD develop symptoms before they turn 18. About 10 percent of patients with IBD have a close family member (parent, brother/sister) who also has the disease.