What is the role of hydrogen breath testing in the evaluation of suspected irritable bowel syndrome (IBS)?

Updated: Dec 11, 2019
  • Author: Jenifer K Lehrer, MD; Chief Editor: BS Anand, MD  more...
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Hydrogen breath testing to exclude bacterial overgrowth may be considered in patients with diarrhea to screen for lactose and/or fructose intolerance. Tissue transglutaminase antibody testing and small bowel biopsy are used especially in diarrhea-predominant irritable bowel syndrome to diagnose celiac disease.

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