SIBO Breath TEST
Non-invasive breath test to evaluate bacterial overgrowth in small intestine. SIBO is very common in people with underactive thyroid.
The test analyses the presence of methane gas hydrogen gas in the exhaled air on several occasions during the day after ingestion of glucose. This will tell if there is a bacterial overgrowth in the small intestine.
You carry out the test yourself at home and then send it to our lab for analysis
Sample report:


Symptoms and conditions commonly associated with SIBO include:
- Bloating/distension
- Gas, diarrhoea or constipation
- Abdominal pain
- Irritable Bowel Syndrome (IBS)
- Inflammatory Bowel Disease (IBD)
- Coeliac Disease and food intolerances
- Diabetes, Fibromyalgia and Parkinson Diseases
- Skin issues
- Chronic fatigue and low energy
- Autoimmune conditions
- Depression and mood disorders
Risk factors that can cause SIBO:
- Underactive thyroid
- Low stomach acid – hypochlorhydria
- Drug-induced hypoacidity (low stomach acid) – commonly seen on those that take PPI’s (proton pump inhibitors)
- Inflammatory bowel disease
- Chronic alcohol use
- Celiac disease
- Chronic pancreatic insufficiency
- Lactose intolerance (the type of natural sugar found in dairy products)
- Damaged ileocecal valve
- Immunodeficiency (especially of secretory immunoglobulin A)

How to perform SIBO test?
You will provide an initial breath sample by blowing into a test tube through a straw, or into a breath collection bag, which will give us your baseline reading.
Then, you will drink water containing glucose which needs to be consumed over a minute or two.
Breath samples will then be taken every 20 minutes for just over three hours in order to measure hydrogen and methane, post-ingestion.
After that you just send back samples to the lab (return envelope and all the details will be provided in the kit).
What else is included?
- Test analysis & interpretation
- 15 min zoom session to walk you through the results and the next steps
Turnaround time: 3 days
Method: Breath Test
Price: £150
