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Clinical chemistry reagents intended to perform qualitative and/or quantitative chemical analysis of body fluids (typically serum and urine) to determine the level of D-xylose. The measure of D-xylose recovered in both samples of blood and urine a specific time after its oral administration permits the determination of D-xylose clearance, which is associated with the mucosal absorption ability of the small intestine. Low absorption of D-xylose is usual in intestine malabsorption but not when malabsorption is due to pancreatic insufficiency; low absorption of D-xylose also occurs in other diseases (e.g., Crohn\'s disease, pellagra, AIDS).
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