Personalized B-fructan Diet in Inflammatory Bowel Disease Patients

Who May Qualify: - Children (age 6-17) or young adults (age 18-39). - Known or suspected UC or IBDU \[there will be 2 control group: non-IBD (undergoing colonoscopy but found not to have IBD; and healthy (no GI symptoms, so not required to have colonoscopy; could be family members)\] - For UC: Remission-mild-moderate disease: Mayo score \<10 - Clinical indication for sedated colonoscopy - Disease location: E2-E4 - Stable treatment (not on steroids; biologics or immunomodulator not changed in last month) - High likelihood that patients will be able to collect all samples and provide all data Who Should NOT Join This Trial: - Use of antibiotics for a week or more over the last 3 months - Use of probiotics or prebiotics at pharmacological doses (adding fibre sources to food or probiotics in yogurt, for example, are allowed) - History of abdominal surgery, including appendectomy - Documented enteric infection during the 3 months prior to endoscopy - Presence of non-IBD bowel conditions (e.g., celiac), anatomical or mucosal abnormalities, motility disorder - Presence of a systemic disease requiring treatment (cancer, ischemic heart disease, kidney failure, etc) - Proctitis (E1) - Systemic steroids (above 10 mg/day of Prednisone) - Topical therapy within 1 week of endoscopy - Recent change in IBD treatment (started biologics or IM over the last month) - Pregnancy or planning to become pregnant during the study - Inability to understand or sign the consent Always talk to your doctor about whether this trial is right for you.