Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Dietary fiber, particularly fermentable fibers, is supported by scientific evidence for its role in the management of Inflammatory Bowel Disorders (IBD), which includes Crohn's disease and ulcerative colitis. Fiber, especially soluble fiber, can help modulate the gut microbiota and increase the production of short-chain fatty acids (SCFAs) such as butyrate, which possess anti-inflammatory properties and may promote mucosal healing. Several clinical studies and meta-analyses suggest that certain types of fiber can be beneficial for patients with IBD, especially during remission phases. For example, psyllium and oat bran have been shown to improve bowel function and, in some cases, prolong remission. However, the evidence is not unequivocal: fiber may exacerbate symptoms during active, severe inflammation or in patients with strictures due to the risk of obstruction. For this reason, recommendations for fiber intake in IBD patients are often personalized, depending on disease activity, location, and individual tolerance. Overall, the use of fiber in IBD is supported by mechanistic and some clinical data, but more high-quality randomized controlled trials are needed to clarify optimal types and dosing. Thus, fiber is used based on moderate scientific validation, particularly for maintenance of remission and overall gut health in IBD patients who can tolerate it.

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