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The large intestine is packed with bacteria, whilst the small intestine typically contains very few bacteria. If the small intestine becomes overgrown with bacteria it can lead to malabsorption of key nutrients, causing symptoms such as nausea, vomiting, diarrohoea, bloating, fatigue, malabsorption of nutrients and weight loss. SIBO is also thought to be a possible factor in some cases of fibromyalgia and chronic fatigue syndrome.

What we test

Hydrogen & Methane Breath Gases

Small Intestinal Bacterial Overgrowth (SIBO) is characterised by an increase in the number and/or the presence of unusual microbiota in the small intestine. The SIBO breath test involves measurement of gases (Hydrogen and Methane) produced by microbiota in the intestine following ingestion of lactulose.

This breath test measures:

Hydrogen increase over baseline by 90 minutes. A rise of >= 20ppm from baseline in hydrogen by 90 min should be considered a positive test to suggest the presence of SIBO.

Peak methane level at any point. A peak methane level >= 10 ppm at any point is indicative of a methane-positive rise.

Test instructions

Your test kit and all instructions are posted directly to you, and there is no need to visit a collection centre.

Mail your sample back to the lab in the prepaid envelope.

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