Graphic of person breathing out molecules of hydrogen and methane

Gut Health Tests for Healthcare Professionals

Your smart diagnostic solution for SIBO and carbohydrate malabsorption.

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Webinar: Breath Biopsy and Digestive Testing Health

Anthony Hobson discusses the non-invasive breath tests currently used to assess gut function and looks to the future.

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Gastrointestinal Disease


Discover case studies and blog articles detailing how Breath Biopsy® could be used to enable non-invasive precision medicine and symptom monitoring for gastrointestinal diseases.

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Take the guesswork out of your patient's diagnoses

As a medical professional you’ll be well aware of the burden that the increasing prevalence of digestive illnesses is placing on healthcare systems around the world. This burden, which affects patients and professionals differently, is exacerbated by the difficulty in obtaining a reliable, cost-effective diagnosis that leads to an appropriate treatment pathway. FGD Owlstone Medical logos
A UK map showing locations of NHS Trusts that use our HMBT services

If you want to safely, simply and accurately confirm or eliminate the possibility of small intestinal bacterial overgrowth (SIBO) or carbohydrate malabsorption, breath testing is the answer. Through our partnership with specialists in gut health, Functional Gut Diagnostics, we can offer your patients (private or NHS) hydrogen methane breath testing at a cost within the NHS tariff – and we're already working with 9 NHS Trusts in the UK.




How can we support you and your patients?

If you’re a UK-based healthcare professional, we can take the stress out of providing a hydrogen methane breath testing service.

Benefits for the clinic / hospital:

Home test icon Unlimited capacity icon Cost effective icon

Minimizes breaches and cancelled appointments due to staff shortages or DNA’s by patients


Reduces staff burden with no limits on testing numbers and fast turnaround of results


Test comes well within the current NHS tariff and cost includes the kit, analysis and reporting


Benefits for the patient:

Patient Friendly icon Flexible icon Convenient icon

Full instructions come with the kit, alongside online videos and telephone support


Patients can do the test at home with no need for a hospital appointment


Once the test is completed, it is posted back to us using the free post envelope


Our simple breath tests produce safe and accurate patient diagnoses:

  • Each test is clinically validated to UK, EU and US standards
  • Test data is interpreted and reported by our expert GI physiologists
  • Tests are non-invasive compared to alternatives such as jejunal aspiration

To find out more fill in this form and our team will be in touch shortly to discuss your needs.

Providing a breath sample

About the tests

How do breath tests for gut health work?

Hydrogen methane breath testing is a simple non-invasive way to investigate gastrointestinal health. Alongside the hydrogen and methane breath tests we offer for SIBO and carbohydrate malabsorption, breath tests have been validated for conditions such as Helicobacter pylori and the assessment of gastric emptying using stable 13C.


FGD Owlstone Medical logosAt Owlstone Medical, we’re global leaders in Breath Biopsy® for applications in early disease detection and precision medicine and we’ve partnered with Functional Gut Diagnostics, leading providers of smart solutions for the diagnosis of gut health problems. We’re working together to provide valuable hydrogen and methane breath testing (HMBT) and develop further innovative breath tests for digestive health that improve patient wellbeing and save healthcare spending.

Find out more about how non-invasive breath testing is set to transform digestive health in our webinar with Dr Anthony Hobson, Clinical Director and Senior Clinical GI Scientist at the Functional Gut Clinic. Anthony has also recorded a podcast with Microbiome Matters on breath tests for SIBO.

WATCH THE WEBINAR      Listen to the podcast      Browse FAQs


Download a sample report for a SIBO Breath Test

Sample Report - hydrogen methane HMBT Test for SIBO 

You can get an insight into the high quality of service we provide through our Hydrogen and Methane Breaths Tests in the UK by viewing a sample breath test report.

We've made available an example report for a patient who had completed a hydrogen and methane breath test (HMBT) to assess for SIBO. In this case the patient has tested positive. This is the type of report (including graphed data) that would be delivered to both NHS and private referrals, at a cost within the NHS tarrif.

Download sample report

How it works

Why are hydrogen and methane so important?

The breath tests we’re offering, alongside our partners Functional Gut Diagnostics, for SIBO and carbohydrate malabsorption detect small amounts of hydrogen and methane gases in your patients’ breath. These gases aren’t produced by our bodies, instead they come from the micro organisms living in our intestines. The amount of hydrogen and methane in your patients’ breath provides valuable insights into their gut health.

In SIBO, the extra bacteria in someone’s small intestine uses the sugars that they eat before their body absorbs it, converting it into hydrogen and methane. Similarly, when someone has a food intolerance, the sugars they’re intolerant to don’t get absorbed efficiently by their body, so there is plenty available for the micro organisms that live in their large intestine to convert into hydrogen and methane.


Some of the hydrogen and methane produced in our gut is absorbed into our blood. The hydrogen and methane in our blood is released in our lungs and can be measured on your patients’ breath with a breath test.

If you would like to learn more about the science behind digestive health breath testing this paper helps to explain the methods we use:

read the paper      view the case study

Get started

What can I do next?

I would like to refer patients for testing

If you’re a specialist UK-based healthcare professional, please fill in the form below and we will be in touch.