Recurrent Abdominal Pain in Children

The purpose of this study is to: 1. To determine if fiber versus placebo improves symptoms in children with recurrent abdominal pain/irritable bowel syndrome. 2. To determine possible ways fiber or placebo improve(s) symptoms in children with recurrent abdominal pain/irritable bowel syndrome by carrying out gastrointestinal tests and questionnaires. Understanding how diet and fiber affect GI function potentially will benefit the large numbers of children with irritable bowel syndrome (IBS) and provide insight into prevention of IBS in at risk children. We expect that the results from these studies can be used to lessen significantly the huge financial burden to society caused by these chronic conditions. Consent will be obtained from the parent/guardian and assent from the child.