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D Xylose

Discover the D-Xylose Test, a valuable diagnostic tool for assessing small intestine health and nutrient absorption. Learn more.

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By Joshua Napilay on Aug 2, 2025.

Fact Checked by Nate Lacson.

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Commonly asked questions

Gastroenterologists, internists, pediatricians, and other healthcare providers may request a D-Xylose Test when assessing patients with gastrointestinal symptoms, unexplained weight loss, or suspected malabsorption disorders.

D-xylose tests are used when there's a suspicion of malabsorption issues, celiac disease, Crohn's disease, tropical sprue, unexplained weight loss, chronic diarrhea, or nutritional deficiencies.

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In a D-xylose test, a patient consumes a measured amount of D-xylose, and urine is collected over a few hours. The collected urine is analyzed to assess the small intestine's absorptive capacity.

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