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Nutrition

SIBO Breath Test Limits

SIBO breath test limits mean hydrogen and methane results are clues with false positives and negatives—pair labs with symptoms and guided nutrition, not supplement stacks.

SIBO breath test limits are the false positive and false negative rates that make hydrogen and methane breath testing a clue—not a courtroom verdict. Recent antibiotics, fast transit, proton pump inhibitors, and improper prep skew results.

Some people with IBS test negative yet still benefit from low FODMAP trials; others test positive with minimal symptoms. Methane-dominant patterns overlap constipation biology differently from hydrogen patterns.

Use breath data with symptom history and dietitian-led nutrition plans, not supplement stacks from ambiguous labs.

Common questions

  • Can you have SIBO with a negative breath test?

    Yes. Fast transit, recent antibiotics, and test prep issues cause false negatives. Clinicians weigh symptoms, history, and sometimes repeat or alternate testing.

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