What is a hydrogen breath test?
A hydrogen breath test is a simple way of determining whether you might have small intestine bacterial overgrowth (SIBO), irritable bowel syndrome (IBS) or lactose intolerance.
Many digestive conditions cause gas in your gut. This is due to the hydrogen produced by anaerobic gut bacteria in your colon as they digest the sugars in the foods that you’ve eaten. Usually, these carbohydrates are pre-digested before they reach the colon but if they haven’t been, the bacteria will have to do this work.
The gas produced by the bacteria can cause bloating and swelling as it moves through your digestive system – and can cause wind at the other end.
These levels can be measured by a simple hydrogen breath test.