What is HMBT?

Hydrogen and Methane Breath Testing (HMBT) is a non-invasive method for gastroenterologists and dietitians to investigate gut function, and detect gastrointestinal disorders such as lactose intolerance, IBS, SIBO and more1.
When your food is digested, it is broken down by the bacteria in your gut and this process releases the gases Hydrogen and/or Methane, which can then be measured on your breath2. Both Hydrogen and Methane can be measured because it is estimated that 33-41% of the population are Methane3, 4, 5 producers.
Based on the levels of the gases you breathe out, healthcare professionals can determine what might be upsetting your stomach and provide you with nutritional advice or medication.

Gastrolyzer range – what is it?

The Gastrolyzer range of hydrogen and methane monitors aids in the detection of gastrointestinal disorders. Please click on the monitors to find out more…

As easy as…


We take the utmost pride in the fact that the Gastrolyzer monitors are accredited to BS EN ISO13485:2016 and CE marked to the Medical Device Directive (MDD).
New CE mark in black


GastroCHART™ is a FREE patient management software for the Gastrolyzer monitors.
Patients can be synchronised between the Gastro+/GastroCH4ECK and computer, enabling you to safely back-up and store patient profiles and results.

Worldwide Forum

With the purchase of any Gastrolyzer monitor, you are eligible to become a member of the Gastrolyzer forum – a place where you can seek answers, offer help or simply discuss HMBT techniques, findings and much more with other healthcare professionals from around the world.
To register, please email forums@bedfont.com.


All the latest on the Gastrolyzer range and HMBT monitoring…

Where to buy?

We operate through a network of carefully selected distributors worldwide – to find your
nearest distributor, click here

Board of Clinicians

We work with a network of KOL’s in the medical world to make sure the Gastrolyzer monitors are fit for purpose. We are always working to improve our Gastrolyzer range and if you would like to be a part of this elite group of Clinicians, please contact Bedfont today.
Head of Upper GI Physiology at the Guy’s and St Thomas’ Foundation Trust Hospitals, Dr Jafari has an MD in Medicine, a PhD in Neurogastroenterology, and has been involved in over 100 research publications regarding gastroenterology. Notably, one of Dr Jafari’s main areas of interest is Hydrogen and C13 GI breath testing.

Our Mission

To help improve the detection of gastrointestinal disorders worldwide through hydrogen and methane breath testing (HMBT).

Our Purpose

To highlight the benefits of hydrogen and methane breath monitoring in gastroenterology and make HMBT more accessible globally through an effective yet cost-efficient range of breath monitors and equally low-cost consumables.

Customer Charter

What we do –

  1. Work hard to design and manufacture the most up to date, high quality, innovative products for use by worldwide health professionals.
  2. Re-invest our profit into future research and development to keep our products up to life saving standards.
  3. Strive to produce high quality consumables at the lowest possible prices.
  4. Committed to provide a very high level of quality customer service that takes account of the changing needs and expectations of our customers.
  5. Work to continuously improve the quality in all that we do.

The Gastrolyzer monitors are products from Bedfont Scientific Ltd.

Our family, innovating health, for yours.


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Bedfont Scientific Ltd., Station Yard, Station Road, Harrietsham, Maidstone, Kent, ME17 1JA, England
© 2020 Bedfont Scientific Ltd., all rights reserved | Privacy Policy | Bedfont Scientific Limited reserves the right to change or update this website without prior notice.
Incorporated in England and Wales under registered number: 1289798


1. Eisenmann, A., Amann, A., Said, M., Datt a, B. and Ledochowski, M. (2008) ‘Implementation and interpretation of hydrogen breath tests’, Journal of Breath Research, 2(4),
2. Ledochowski, M. and Ledochowski, L. (2011) Hydrogen Breath Tests. 2nd Edition edn. Austria: Verlag Akademie für Ernahrungsmedizin GmbH.
3. Roccarina, D., Lauritano, E. C., Gabrielli, M., Franceschi, F., Ojetti , V. and Gasbarrini, A. (2010) ‘The role of methane in intestinal diseases’, The American Journal of
Gastroenterology, 105(6), pp. 1250–1256.
4. Pitt, P., de Bruijn, K. M., Beeching, M. F., Goldberg, E. and Blendis, L. M. (1980) ‘Studies on breath methane: The effect of ethnic origins and lactulose’, Gut, 21(11), pp. 951–954.
5. Di Stefano, M. and Corazza, G. R. (2009) ‘Role of hydrogen and methane breath testing in gastrointestinal diseases’, Digestive and Liver Disease Supplements, 3(2), pp. 40–43.