High-Fiber Diets Prevent Polyps
High-fiber diets may help prevent colon cancer, according to new results from the Polyp Prevention Trial. Previous studies yielded ambiguous findings about whether fiber could reduce the recurrence of colon polyps, which are often a first indication of colon cancer. The new report looked at participants who were the most compliant to a high-fruit-and-vegetable diet, finding that the diet reduced their odds of polyp recurrence by up to 35 percent and reduced their odds of advanced polyp recurrence almost 50 percent. The 1,905 participants were at least 35 years old and had at least one confirmed colorectal polyp. The test diet limited fat to 20 percent of calories, with 18 grams of fiber and 3.5 servings of fruits and vegetables per 1,000 calories.
In previous studies, plant-based and vegetarian diets have been associated with a much lower incidence of colon cancer.
Sansbury LB, Wanke K, Albert PS, et al. The effect of strict adherence to a high-fiber, high-fruit and-vegetable, and low-fat eating pattern on adenoma recurrence. Am J Epidemiol. 200;170:576-584.
Fraser GE. Associations between diet and cancer, ischemic heart disease, and all-cause mortality in non-Hispanic white California Seventh-day Adventists. Am J Clin Nutr. 1999;70(suppl 3):532S-538S.
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