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Your lactulose/mannitol ratio is in the normal range. Your gut tight junctions are functioning appropriately and maintaining normal gut barrier selectivity.
Your lactulose/mannitol ratio is very low, indicating an exceptionally tight gut barrier. The test measures how much of the large sugar (lactulose) passes through the gut wall compared to the small sugar (mannitol). Very low ratios indicate no significant paracellular leakage.
No action needed. Excellent gut barrier function.
Lactulose/mannitol ratio very low — excellent gut barrier integrityYour lactulose/mannitol ratio is within the normal range. This indicates that your gut tight junctions are intact and large molecules are not passing through the gut wall at an abnormal rate.
No action needed. Continue a diet that supports gut barrier integrity.
Lactulose/mannitol ratio within normal range — normal gut permeabilityYour ratio is in the low-normal range, indicating good gut barrier integrity.
No action needed.
Lactulose/mannitol ratio: low-normal — good gut permeabilityYour lactulose/mannitol ratio is in the normal range. Your gut tight junctions are functioning appropriately and maintaining normal gut barrier selectivity.
No specific action required.
Lactulose/mannitol ratio within reference range — normal gut barrier functionYour ratio is in the optimal range, reflecting excellent gut barrier function and minimal paracellular permeability.
No action needed.
Lactulose/mannitol ratio: optimal — tight gut barrierYour lactulose/mannitol ratio is mildly above the reference range, suggesting early or mild increased gut permeability. This can be caused by gluten (in sensitive individuals), NSAIDs, stress, dysbiosis, or early inflammatory gut disease.
Consider reducing gut irritants (NSAIDs, alcohol, gluten if sensitive). Support gut barrier with fiber, fermented foods, zinc, and L-glutamine. Retest in 3 months.
Lactulose/mannitol ratio 0.03–0.07 — borderline elevated; mild gut permeability increaseYour gut permeability is significantly elevated. An elevated lactulose/mannitol ratio confirms that large molecules are passing through the gut wall at an abnormal rate. This is associated with celiac disease, Crohn's disease, NSAID enteropathy, and other inflammatory gut conditions.
Seek gastroenterology evaluation. Celiac disease testing, IBD assessment, and gut microbiome analysis are recommended. Therapeutic gut barrier repair strategies should be initiated under medical guidance.
Lactulose/mannitol ratio >0.07 — elevated; significant gut permeability increase confirmedYour lactulose/mannitol ratio is critically elevated, indicating very compromised gut barrier function. This level is associated with active celiac disease, noticeable Crohn's disease, noticeable NSAID-induced enteropathy, or critical illness-related gut barrier failure.
Seek urgent gastroenterology evaluation. Comprehensive gut investigation including colonoscopy, small bowel imaging, and celiac antibody testing is urgently needed.
Lactulose/mannitol ratio >0.15 — critically elevated; noticeable gut permeabilityUpload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.