Synopsis

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

Vegetable fiber, broadly categorized as dietary fiber, is scientifically validated as a supportive measure in the management of diverticulitis, particularly in the prevention of recurrent episodes and the maintenance phase after acute inflammation subsides. Historically, a high-fiber diet has been recommended for diverticular disease based on epidemiological observations that populations consuming more dietary fiber have lower rates of diverticulosis and its complications. More recent clinical studies and guidelines from organizations such as the American Gastroenterological Association support the inclusion of fiber after recovery from acute diverticulitis to help normalize bowel movements and reduce the risk of recurrence. The mechanism is thought to involve fiber’s ability to increase stool bulk and decrease colonic pressure, potentially reducing the formation of new diverticula and the risk of their inflammation. However, during acute flares of diverticulitis, a low-fiber or clear liquid diet is typically recommended until symptoms improve. The quality of evidence is moderate; while controlled trials are limited, cohort studies and systematic reviews generally support the beneficial role of fiber in diverticular disease management. Nevertheless, fiber type, source, and optimal amounts are not universally agreed upon, and recommendations often generalize to “dietary fiber” rather than specifying particular vegetable fibers. In summary, the use of vegetable fiber in diverticulitis is scientifically supported, especially for long-term management and prevention of recurrence.

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