Intestinal Permeability Test


The intestinal permeability test examines small intestinal absorption and barrier function in the bowel. The test involves taking two sugar solutions (lactulose and mannitol) and then collecting a urine sample over the next 6 hours.

Markers On This Test:

  • Lactulose Percent Recovery,
  • Mannitol Percent Recovery, and
  • Lactulose/Mannitol Ratio.

Test Details:

  • Test Type: Urine sample collected for the 6 hours after the drink).
  • Test Turnaround: 7 – 14 days.
  • Instruction SheetDownload Test Instructions.
  • Sample Report: Download Sample Report.
  • Additional Comments: If SIBO is present, the bacteria may ferment the lactulose, causing a false negative.