Here's another Leo Galland article on Leaky Gut Syndrome that also discusses bacterial dysbiosis. I've included an excerpt on using the intestinal permeability test to diagnose gluten sensitivity/celiac disease:
http://mdheal.org/leakygut.htm
Quote:
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IF THE INITIAL FASTING MANNITOL ABSORPTION IS LOW, suspect malabsorption. This result has the same significance as an abnormal D-xylose absorption test. Look for evidence of celiac disease, intestinal parasites, ileitis, small bowel bacterial overgrowth and other disorders classically associated with intestinal malabsorption and treat appropriately. After eight weeks of therapy, repeat the lactulose/mannitol challenge. An improvement in mannitol excretion indicates a desirable increase in intestinal absorptive capacity. The lactulose/mannitol assay has been proposed as a sensitive screen for celiac disease and a sensitive test for dietary compliance. For gluten-sensitive patients, abnormal test results demonstrate exposure to gluten, even when no intestinal symptoms are present. Monitoring dietary compliance to gluten avoidance by testing small bowel permeability is especially helpful in following those patients for whom gluten enteropathy does not produce diarrhea but instead causes failure to thrive, schizophrenia or inflammatory arthritis.
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Claire