Alternative Names

Diet – fiber; Roughage; Bulk

Definition of Fiber

Fiber is a substance found in plants. Dietary fiber — the kind you eat — is found in fruits, vegetables, and grains. It is an important part of a healthy diet.


Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. – 7/22/2010

Sources of fiber

ADAM Medical Encyclopedia

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