SIBO Breath Test
SIBO Lactulose Breath Test
The 3-hour Lactulose SIBO Breath Test provides valuable insight into both small and large intestinal function. After ingesting lactulose, the test measures hydrogen (H₂) and methane (CH₄) gases at timed intervals.
Carbon dioxide (CO₂) is measured in each sample to confirm proper sample quality and test validity.
This non-invasive breath test helps identify disturbances in fermentation patterns that can contribute to bloating, altered bowel habits, abdominal discomfort, slow motility, and persistent IBS-type symptoms.
An early rise in hydrogen or methane suggests small intestinal bacterial overgrowth (SIBO) or intestinal methanogen overgrowth (IMO).
A later rise reflects colonic fermentation or methanogenesis.
Tested Biomarkers:
- Carbon Dioxide (CO₂)
- Hydrogen gas (H₂)
- Methane gas (CH₄)
When should you consider this test?
Consider the Lactulose SIBO Breath Test if you suspect small intestinal bacterial or methanogen overgrowth. It is particularly useful for individuals with:
- Ongoing IBS-type symptoms
- Bloating, distension, or excessive gas
- Diarrhoea or constipation
- A history of gastroenteritis, food poisoning, or long-term PPI use
- Unexplained abdominal discomfort or altered bowel habits
- Suspected dysmotility, slow transit, or methane-related constipation (IMO)
Not recommended for diabetics due to the nature of the lactulose challenge.
Results-only service
This test is provided as a results-only service, meaning no consultation or interpretation is included. Results are sent directly to you to review independently. If you later wish to book a consultation, this can be arranged separately.
