3 Questions Before Treating a SIBO Breath-Test Result

After enough meals spent wondering what will happen to your belly, a positive test can feel like an answer you have been waiting for. Before building treatment around it, ask what that result means in your circumstances.

Three questions about the result

1. Why was SIBO suspected in my case? Ask which history or findings made the diagnosis plausible before the test. The European guideline places particular weight on underlying risk conditions and clinical context.¹
2. Could intestinal transit explain the gas pattern? Both glucose and lactulose tests can produce false-positive results when the test sugar reaches the colon quickly. A result marked positive does not remove this interpretation problem.¹
3. What supports the proposed treatment? The 2024 update warns against unreliable testing and unnecessary antibiotic treatment in IBS. It separates that concern from classic SIBO in settings such as intestinal stasis after small-bowel surgery or certain motility diseases with malabsorption. Ask how that distinction applies to you.²

Bring the report, not only the positive label

Take the full report and any written preparation instructions you followed. Ask the clinician to explain the reasoning for the next step and what would count as a useful outcome.

Write down the meals, activities and plans that symptoms are disrupting. If you have begun canceling lunches, include that. You can ask for a plan that addresses those difficulties while the test’s meaning is reviewed.

Bloated by Dinner includes a Belly Clock log and a Test-It list with a visit script. Use them to organize your observations and questions for a clinical discussion. See the book.