D-xylose Absorption Test

Xylose Tolerance Test

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• Large amounts of bacteria in the intestines.
• Kidney disease or bladder problems that prevent you from completely emptying your bladder.
• Medicines, such as antibiotics, aspirin, and heart medicines. Many medicines can affect D-xylose test results.
• Physical activity during the test. You will be instructed to rest quietly until the test is complete.
• Conditions that cause food to remain in the stomach for a long time.

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Author:	Bets Davis, MFA	Last Updated: April 29, 2009
Medical Review:	Kathleen Romito, MD - Family Medicine Jerome B. Simon, MD, FRCPC, FACP - Gastroenterology
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