The Xylose absorption test estimates the blood and urine Xylose (one kind of sugar) from a particular sample to diagnose reasons of malabsorption. Generally, D-Xylose is easily absorbed by intestines. When someone has symptoms of malabsorption like persistent diarrhea, fatty stools (Steatorrhea), abdominal pain and cramps, bloating as well as weight loss, doctors prescribe D-Xylose absorption test. The purpose is to identify the physiological condition of intestinal capacity or understand probable reasons of malabsorption. In case of inadequate absorption, the Xylose level in blood and urine sample is found low.