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How can fiber affect irritable bowel syndrome and gas?

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"Get more fiber" is standard advice for people with irritable bowel syndrome, especially if you have constipation. But sometimes it can make gas worse. The type and amount of fiber you add matters. So does how you add it to your diet.

Insoluble fiber, found in whole wheat, tends to make more gas. Two types of fiber appear to reduce gas: methylcellulose and polycarbophil. They can be found in some fiber supplements.

Increase your fiber gradually. It may give you more gas at first, but that should get better as your body gets used to it.

From: IBS and Gas WebMD Medical Reference

SOURCES:

Hernando-Harder, A. April 2010. American Journal of Gastroenterology,

International Foundation for Functional Gastrointestinal Disorders: "Bloating," "Report from Fernando Azpiroz, MD, PhD: Understanding Intestinal Gas," "Controlling Intestinal Gas," "What are treatment options for IBS?" "Probiotics and Antibiotics," "Gut Bacteria and IBS," "Symptoms of IBS," "The Low FODMAP Diet Approach: Dietary Triggers for IBS Symptoms," "IBS Diet: Dietary Fiber."

American Academy of Family Physicians: "Irritable Bowel Syndrome."

UpToDate: "Patient Information: Irritable Bowel Syndrome (Beyond the Basics.)"

Eswaran, S. April 2013. American Journal of Gastroenterology,

National Institute of Diabetes and Digestive and Kidney Diseases: "Irritable Bowel Syndrome."

Staudacher, H. October 2011. Journal of Human Nutrition and Dietetics,

Monash University: "Low FODMAP diet for Irritable Bowel Syndrome."

Aragon, G. January 2010. Gastroenterology & Hepatology,

UpToDate: "Patient Information: Gas and bloating (Beyond the Basics.)"

Therapeutic Advances in Gastroenterology, July 2009.

Reviewed by Minesh Khatri on December 6, 2017

SOURCES:

Hernando-Harder, A. April 2010. American Journal of Gastroenterology,

International Foundation for Functional Gastrointestinal Disorders: "Bloating," "Report from Fernando Azpiroz, MD, PhD: Understanding Intestinal Gas," "Controlling Intestinal Gas," "What are treatment options for IBS?" "Probiotics and Antibiotics," "Gut Bacteria and IBS," "Symptoms of IBS," "The Low FODMAP Diet Approach: Dietary Triggers for IBS Symptoms," "IBS Diet: Dietary Fiber."

American Academy of Family Physicians: "Irritable Bowel Syndrome."

UpToDate: "Patient Information: Irritable Bowel Syndrome (Beyond the Basics.)"

Eswaran, S. April 2013. American Journal of Gastroenterology,

National Institute of Diabetes and Digestive and Kidney Diseases: "Irritable Bowel Syndrome."

Staudacher, H. October 2011. Journal of Human Nutrition and Dietetics,

Monash University: "Low FODMAP diet for Irritable Bowel Syndrome."

Aragon, G. January 2010. Gastroenterology & Hepatology,

UpToDate: "Patient Information: Gas and bloating (Beyond the Basics.)"

Therapeutic Advances in Gastroenterology, July 2009.

Reviewed by Minesh Khatri on December 6, 2017

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What carbs are a problem for people with irritable bowel syndrome?

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