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Fiber

Dietary fiber is the part of plant foods that the body cannot digest. Eating foods with fiber helps to keep the digestive tract healthy, stabilize blood sugar levels, and control cholesterol levels.

The recommended daily intake of fiber is 20g to 35g.

Fiber in the diet is classified as either soluble or insoluble.

  • Soluble fiber. As part of a low-fat, low-cholesterol diet, soluble fiber has been shown to help lower blood cholesterol by about 2% to 4%. Foods high in soluble fiber include oat bran, oatmeal, dry beans and peas, rice bran, barley, citrus fruits, strawberries, and apple pulp (the solids left after making apple juice).
  • Insoluble fiber. Insoluble fiber does not lower blood cholesterol, but it is important in keeping the bowels healthy and preventing constipation and diverticular disease. Foods high in insoluble fiber include whole-wheat breads, wheat cereals, wheat bran, cabbage, beets, carrots, brussels sprouts, turnips, cauliflower, and apple skin.

Bran is widely known as a good source of fiber. However, many commercially made bran products, such as muffins and waffles, actually contain very little bran, and they are often high in saturated and total fat. Check the labels for the actual fiber content.

Author Jeannette Curtis
Author Caroline Rea, RN, BS, MS
Editor Kathleen M. Ariss, MS
Editor Susan Van Houten, RN, BSN, MBA
Associate Editor Tracy Landauer
Associate Editor Pat Truman
Primary Medical Reviewer Patrice Burgess, MD
- Family Medicine
Primary Medical Reviewer Adam Husney, MD
- Family Medicine
Primary Medical Reviewer Kathleen Romito, MD
- Family Medicine
Last Updated May 25, 2007

WebMD Medical Reference from Healthwise

Last Updated: May 25, 2007
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.