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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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The following is used for testing absorption in intestine -
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The correct answer is  D-xylose absorption test is used to check how well your intestines are absorbing a simple sugar called D-xylose. From the results of the test, your doctor can infer how well your body is absorbing nutrients. D-xylose is a simple sugar that occurs naturally in many plant foods. Ref Davidson edition23rd pg 822