Synopsis

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

Fiber blends, which typically contain a mixture of soluble and insoluble fibers, are commonly recommended for the management of diverticular disease, particularly for preventing diverticulitis flare-ups rather than treating acute inflammation. The scientific rationale stems from observational and interventional studies suggesting that a high-fiber diet can reduce symptoms of diverticulosis (the presence of diverticula) and lower the risk of complications such as diverticulitis (inflammation or infection of diverticula). Fiber increases stool bulk and decreases colon pressure, potentially reducing the formation of new diverticula and the risk of inflammation. Several clinical guidelines, including those from the American Gastroenterological Association, recommend increasing dietary fiber intake for individuals with diverticular disease, based on moderate-quality evidence. However, randomized controlled trials specific to fiber supplementation for preventing diverticulitis are limited, and results are mixed. Some studies indicate a reduction in symptoms like constipation and abdominal discomfort, while others note no significant benefit in preventing recurrence of diverticulitis. During acute diverticulitis episodes, a low-fiber or clear liquid diet is often recommended until inflammation resolves, after which fiber can be gradually reintroduced. Overall, while fiber blends are widely used and recommended in clinical practice for diverticular disease, the evidence supporting their use for preventing diverticulitis recurrence is moderate but not definitive.

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