Xylose Absorption Test (Adult 25g dose)
Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Serum fasting specimen: No reference intervals for the fasting serum: it is used as a blank when testing the two-hour specimen.
Serum xylose at 2 hours:
17 years and older: 32-58 mg/dL
Xylose excretion, % dose 5 hr:
17-64 years: 16-40 %
65 years and older: 14-40 %
Xylose excretion, g/5 hr:
17-64 years: 4.0-10.0 g/5hrs
65 years and older: 3.5-10.0 g/5hrs