Synopsis

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

Fiber blends, typically composed of various soluble and insoluble fibers (such as psyllium, inulin, oat bran, etc.), are commonly used as adjunctive therapy in the management of Inflammatory Bowel Disorders (IBD), including Crohn’s disease and ulcerative colitis. The scientific rationale for their use lies in the beneficial effects of dietary fiber on gut health. Research indicates that certain types of dietary fiber are fermented by gut microbiota to produce short-chain fatty acids (SCFAs), such as butyrate, which have anti-inflammatory properties and support colonic mucosal integrity. Several clinical studies have demonstrated that specific fibers (notably psyllium) can improve stool consistency, reduce symptoms, and potentially even decrease disease activity in some IBD patients, although responses can be highly individual and some fibers may worsen symptoms in active disease or stricturing forms.

However, the overall quality of evidence is moderate and somewhat mixed, with some studies showing benefit and others showing no significant effect or even adverse outcomes, especially if fiber is introduced during acute flares or in the presence of strictures. Major gastroenterological guidelines often recommend individualized approaches, suggesting that fiber supplementation may be helpful, particularly during remission phases of IBD, but should be used cautiously and tailored to the patient. In summary, there is moderate scientific validation for the use of fiber blends in supporting IBD management, but recommendations are nuanced and not universally applicable.

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