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Fiber - Side Effects

Alternative Names

Diet - fiber; Roughage; Bulk

Side Effects:

Eating a large amount of fiber in a short period of time can cause intestinal gas (flatulence), bloating, and abdominal cramps. This usually goes away once the natural bacteria in the digestive system get used to the increase in fiber in the diet. Adding fiber gradually to the diet, instead of all at one time, can help reduce gas or diarrhea.

Too much fiber may interfere with the absorption of minerals such as iron, zinc, magnesium, and calcium. However, this effect usually does not cause too much concern because high-fiber foods are typically rich in minerals.

  • Reviewed last on: 7/22/2010
  • 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.

References

Slavin JL. Position of the American Dietetic Association: health Implications of Dietary Fiber. J Am Diet Assoc. 2008;108: 1716-1731.

Burleson K. Coronary artery disease. In: Rakel D, ed. Integrative Medicine. 2nd ed. Philadelphia, Pa: WB Saunders; 2007:chap 28.

Park D, Ring M. Peripheral vascular disease. In: Rakel D, ed. Integrative Medicine. 2nd ed. Philadelphia, Pa: WB Saunders; 2007:chap 29.

Underbakke G, McBride P. Dyslipidemias. In: Rakel D, ed. Integrative Medicine. 2nd ed. Philadelphia, Pa: WB Saunders; 2007:chap 40.

Hanaway P. Irritable bowel syndrome. In: Rakel D, ed. Integrative Medicine. 2nd ed. Philadelphia, Pa: WB Saunders; 2007:chap 41.

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