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Hydrogen Breath Test for Small Intestinal Bacterial Overgrowth (SIBO)
Small Intestinal Bacterial Overgrowth can easily be diagnosed by testing patients' breath samples for levels of hydrogen, methane, or both. After ingesting a lactulose solution, the patient produces breath samples every 20 minutes over a 3-hour period.
Samples are then mailed to Commonwealth Laboratories, Inc. Analysis of the samples yields data on production of the targeted gases as the digestive process proceeds. The graph produced using this data provides key indicators of the existence/ extent of SIBO. The graph is a clear and understandable tool that physicians may share with patients in reviewing their test results.
- SIBO breath test instructions
- Sample SIBO breath test report
- FAQ's for patients
- FAQ's for physicians
Can small intestinal bacterial overgrowth be treated?
Yes. Once bacterial overgrowth has been diagnosed, a health practitioner can use an appropriate antibiotic regimen to eradicate the bacteria, relieving the symptoms. Treatment can then begin on the underlying causes to keep overgrowth from recurring.
Hydrogen breath test
Our breath test measures both hydrogen and methane production as the digestive process proceeds. Accurate analysis of these gases can be used to assist in the diagnosis of several conditions that can cause gastrointestinal symptoms, such as...


