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Dietary fiber plays a critical role in pediatric gastrointestinal health by modulating gut microbiota, improving bowel function, and supporting immune development. Evidence consistently supports its benefit in functional constipation, while effects on abdominal pain, inflammatory bowel disease, and irritable bowel syndrome remain variable due to differences in fiber type, dosage, and study design. Clinically, fiber should be used as an adjunct therapy within individualized dietary and behavioral management strategies for children. |