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Hydrogen Breath Test


Hydrogen Breath Test Explained


Hydrogen Breath Testing Services in Alexandria, VA

A hydrogen breath test is an excellent diagnostic tool for many gastrointestinal disorders, nearly all of which are associated with carbohydrate malabsorption. This test measures the hydrogen gas exhaled by bacteria in the colon that is caused by fermentation of carbohydrates that are not fully absorbed in the small intestine. At DMV Allergy & Asthma Center, our experienced and caring team uses this test to diagnose lactose intolerance, fructose malabsorption, and small intestinal bacterial overgrowth.

FAQ about Hydrogen Breath Testing



  • How to prepare for a Hydrogen Breath Test?
How to prepare for a Hydrogen Breath Test?

The patient is often asked to adhere to some dietary restrictions.  You may be asked to avoid some food or drinks before the test. Fasting may also be necessary before this test is given.


  • What is the process of the test?
What is the process of the test?

After obtaining a baseline sample and ingestion of carbohydrates, breath samples are collected at regular intervals after the ingestion of carbohydrate. Hydrogen gas, if produced by bacteria in the colon as a result of malabsorption and absorbed into the blood stream, is eventually expelled in the breath. Breath sample analysis: The breath samples are analyzed for the presence of hydrogen. Against the baseline, a high amount of hydrogen in the breath would direct toward the malabsorption of the ingested carbohydrate.


  • Could any problems arise during this test?
Could any problems arise during this test?

This should warn one that the results could be derailed by medications taken, use of antibiotics, and gastrointestinal disorders. It should, therefore, be interpreted by a professional well conversant with the specific test conducted and the history of the patient.


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