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Health benefits and practical aspects of high-fiber diets.

Over the past 20 y dietary fiber has emerged as a leading dietary factor in the prevention and treatment of chronic diseases. High fiber intakes are associated with lower serum cholesterol concentrations, lower risk of coronary heart disease, reduced blood pressure, enhanced weight control, better glycemic control, reduced risk of certain forms of cancer, and improved gastrointestinal function. Dietary fiber can be categorized into water-soluble and water-insoluble components. Dried beans, oat products, and certain fruits and vegetables are good sources of soluble fiber. Most plant foods are good sources of insoluble fiber and wheat bran is a concentrated form of insoluble fiber. Current guidelines advise a doubling of dietary fiber intake for Americans. Inclusion of ample servings of fruits and vegetables, whole grains, and dried beans and peas will help individuals meet these guidelines.