H2 exhalation functional test

What is H2 breath test?

The hydrogen (H2) breath test is a painless, non-invasive diagnostic test used to detect small intestinial bacterial overgrowth (SIBO), lactose intolerance, fructose intolerance and other carbohydrate malabsorption disorders. The test measures the hydrogen levels in your breath, which can increase if carbohydrates are not properly digested or absorbed. 

When is the test needed?

Your doctor may recommend the test if you experience:  
-    bloating and excessive gas
-    abdominal pain or cramping
-    diarrhea or constipation
-    nausea
-    unexplained digestive issues

How is the test performed?

The test is performed on an empty stomach and takes approximately 2-3 hours.
1.    Baseline sample collection– You will blow into a special device that measures the hydrogen level in your breath. 
2.    Test solution intake– A Depending on the test type, you will drink a solution containing lactose, fructose, glucose, or lactulose. 
3.    Repeated breath samples– You will blow into the device at regular intervals (usually every 15-30 minutes) for about 2-3 hours.