Personalized Anti-Inflammatory Fibres in Ulcerative Colitis

This study is testing whether personalized dietary fiber supplements can reduce gut inflammation and improve symptoms in people with mild ulcerative colitis (UC), a type of inflammatory bowel disease. Each participant will receive a fiber blend tailored to their own gut microbiome. **You may be eligible if...** - You have a confirmed diagnosis of ulcerative colitis - You have a fecal calprotectin (a stool inflammation marker) above 250 - Your disease is currently mild (based on standard scoring systems) - You have been on stable IBD medications for at least 3 months - You weigh more than 50 kg - Pediatric patients: must be at Tanner stage 5 and have mild disease on pediatric scoring - Women: must be menstruating and using contraceptives **You may NOT be eligible if...** - You have Crohn's disease, indeterminate colitis, celiac disease, or a motility disorder - You have taken antibiotics for more than a week in the 2 months before the study - You are unable to give informed consent - Your IBD medications were recently changed Talk to your doctor to see if this trial is right for you.