The main way that increased fibre helps is by reducing the chance of constipation. Although there have been multiple uncontrolled studies demonstrating the beneficial effect of fibre supplements in patients with non-specific symptoms and diverticulosis, lack of a placebo group make any such data suspect. Another study involving 18 patients in 1977, showed a significant decrease in bowel symptoms after 3 months of a high-fibre diet. The observations that high-fibre diets are associated with less colonic diverticulosis have led to the hypothesis that higher fibre diets might even prevent diverticular disease. A significant inverse association was found between insoluble dietary fibre intake and the risk of subsequently developing symptomatic diverticular disease.
Studies show that fruits and vegetables seem to offer more protection than cereal fibres.
There also seems to be a similar protective component from physical activity. A high intake of total fat and red meat may increase the risk of the disease. Dietary Changes - Fibre Patients with diverticular disease should discuss the gradual addition of fibre into their diet with a physician or dietitian. The fibre content of foods stays the same with cooking although its effect may be reduced. If choosing higher fibre foods, it is essential to drink at least six to eight glasses of fluid per day as well.