Medicine General 01fa8058 Urinary D-Xylose test is used for the the study of: A Proximal small bowel mucosal function B Distal small bowel mucosal function C Proximal small bowel serosal function D Distal small bowel serosal function High-Yield Explanation The urinary D-xylose test: Used for carbohydrate absorption Assesses proximal small-intestinal mucosal function. Ref: Harrison, E-18, P-2467.