SIBO Breath Test (Lactulose)
£195.00
The SIBO (Small Intestinal Bacterial Overgrowth) Lactulose Test is a non-invasive breath test designed to detect bacterial overgrowth in the small intestine, a condition that is often linked to digestive disorders such as irritable bowel syndrome (IBS).
By measuring hydrogen and methane levels in the breath after consuming lactulose, this test provides valuable insights that support a functional medicine approach to gut health. The results enable personalised nutritional and therapeutic strategies aimed at addressing the underlying causes of symptoms, rather than merely alleviating them.
- Order your preferred test option (Essential or Comprehensive package)
- Receive your kit via post with full collection instructions
- Collect your sample and return to lab using provided packaging
- Results and summary report sent via email — plus book your in-depth clinical review session if purchased.
- Need Help Choosing a Test? Get in touch or book a free 15-minute discovery call with our team —
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This test is suitable for individuals experiencing persistent bloating and excessive gas; abdominal pain or discomfort; irregular bowel habits, including diarrhoea, constipation, or alternating patterns commonly seen in IBS; suspected imbalances in the gut microbiome contributing to chronic digestive symptoms. The SIBO Lactulose Test is appropriate for most individuals, including those with diabetes, as lactulose does not cause significant changes in blood sugar levels. This test is ideal for those seeking a thorough understanding of their digestive health within a functional medicine framework.
Frequently Asked Questions
Hydrogen-dominant SIBO is typically associated with diarrhoea, while methane-dominant SIBO (now often referred to as IMO – Intestinal Methanogen Overgrowth) is linked to constipation. This test measures both gases, helping to pinpoint the type of overgrowth and guide tailored treatment strategies.
Preparation usually includes following a specific diet the day before and fasting overnight. You’ll also need to avoid certain medications or supplements that could affect the results. Full instructions are provided with the kit to ensure accuracy.
If your results are positive, our practitioners can develop a personalised plan that may include antimicrobial or herbal treatments, dietary modifications (such as a low FODMAP approach), and support for gut motility to help rebalance your microbiome and prevent recurrence.
What Our Customers Say
“This test was the breakthrough I needed. It explained my constant bloating and finally got me on the right track.”
– Max D
“Simple to use at home and very accurate. I was surprised to learn I had methane-dominant SIBO which highly influenced how we approached treatment.”
– Bradley P
“Highly recommend if you’ve been dealing with IBS symptoms that come and go. This test gave me answers where others failed.”
– Nicola A
