Synopsis

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

Cellulose is widely used as a source of dietary fiber, and its use in the management of diverticulitis and diverticular disease is supported by scientific evidence, particularly regarding prevention and management of diverticulosis and mild diverticular symptoms. Cellulose is an insoluble fiber that increases stool bulk and facilitates regular bowel movements, which is thought to reduce colonic pressure and the risk of diverticula formation. Several observational studies and clinical guidelines recommend the consumption of a high-fiber diet, including cellulose-rich foods, to potentially lower the risk of developing diverticulitis and to help manage uncomplicated diverticular disease. However, the evidence is less robust for the treatment of acute diverticulitis episodes, where a low-fiber or clear liquid diet is often initially recommended until symptoms subside, after which fiber intake is gradually increased. Randomized controlled trials on fiber supplementation (including cellulose) for diverticular disease generally show improvement in symptoms such as constipation and abdominal discomfort, but the evidence is moderate rather than strong due to heterogeneity in study design and fiber type. In summary, while cellulose is not specifically used to treat acute diverticulitis, its regular inclusion in the diet is scientifically validated for prevention and long-term management of diverticular disease and symptoms, earning a moderate evidence rating.

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