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Since the 1980s, the Gastrolyzer® range breath hydrogen (H2) and methane (CH4) monitors have been the gold standard to aid in the detection and management of gastrointestinal disorders.

One monitor can do it all :

  • SIBO (small intestinal bacterial overgrowth)
  • Intolerances & Malabsorption Issues:
    • Lactose Intolerance
    • Fructose Intolerance
    • Fructan Intolerance
    • Sucrose Intolerance
    • Sorbitol Intolerance
    • Xylitol Intolerance

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Family of Breath H2 & CH4 Monitors

GastroCHECK® Gastrolyzer®

The world’s most advanced CH4 H2 monitor gets even better with:
●  instant warm up
●  2 Sampling Modes: mouthpiece sampling
or take home test kits
●  & more…

GastroCHECK face on
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The world’s most advanced handheld H2 monitor gets even better with:
●  instant warm up
●  ability to manage multiple studies
on the monitor
●  & more…

Gastro 122
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Confused by too many options?

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Why Gastrolyzer®?

The features that matter for office efficiency and patient comfort.

gastro 30 years logo

30+ Year Heritage:

  • Most advanced and easy to use methane (CH4) and hydrogen (H2) breath analysis monitors
  • Most trusted brand of breath analysis devices in the world
  • Most relied on brand by the world’s leading research institutions and organizations

2 Year Warranty NC e1560732114668

2 Year Warranty:

  • Industry leading warranty for absolute peace of mind
  • Covers all monitor components including the sensors

Rapid Results:

● Immediate results on the monitors at your fingertips

GastroCHECK – Methane (CH4) & Hydrogen (H2)

2 Sampling Options:

  1. Mouthpiece Sampling
  2. Take Home Test Kits

Gastro+ – Hydrogen (H2) Only

  1. Mouthpiece Sampling Only

Simple User Interface:

  • Simple to use, large color LCD touchscreen
  • Easy to follow and intuitive menus with icons
  • Exhalation guide – coaches patients through entire exhalation process to ensure proper technique and accurate results

Training, Support & Service:

  • Online training included
  • Lifetime telephone technical support
  • All service & support handled in USA

Save Time:

  • Instant boot up
  • No warm up
  • Sample Correction on GastroCHECK
  • Gastro+ Automatically saves last 150 readings
  • Gastro+ On-device multiple patient testing with ability to save readings & chart results
  • Gastro+ Remote software updates
  • Built-in testing protocols — automatically manages entire study & patients details conveniently on the Gastro+ monitor
  • Meet your needs — Gastro+ on-device customization

Low Operating & Maintenance Costs:

  • Inexpensive accessories – as low as approximately $0.15 per test:
    – GastroCHECK $5.95 per study
    – Gastro+ $0.15 per breath sample
  • Simple calibration with automatic reminders:
    – GastroCHECK only required monthly
    – Gastro+ only required only every 3 months
  • Automatic accessory replacement reminders:
    – Gastro+ monthly D-piece replacement reminders to ensure optimal readings

Screen Shot 2019 08 02 at 1.18.17 PM

Highest Levels of Infection Control:

  • Individually wrapped single-use Gastro+™ SteriBreath™ mouthpieces
  • Individually wrapped and multi-use for the day, GastroCHECK® mouthpieces are specifically designed with integrated filtration to remove 99% of airborne bacteria, 99% of viruses and any moisture from the patient’s breath
  • Gastro+™ has built-in SteriTouch™ technology which kills 99.99% bacteria on contact, to ensure optimum infection control
  • Gastro+™ D-pieces™ are used in conjunction with the monitor to filter out 99% of airborne bacteria and 97% of viruses and any moisture from the patient’s breath

Software Included:

  • GastroCHART™ Unlimited Patient Database & patient management software
  • Maximize your time and reimbursement with the ability to test up to 10 patients simultaneously
  • Software manages study with automatic countdown timers which prompts and manages the complete study
  • Automatic charting to aid in interpretation and analysis of patient results
  • Built in protocols for various studies with the ability to customize them

Engineering with Purpose

  • Gastro+™ has a compact handheld design and the sleek design of GastroCHECK® makes unit mobile with the use of a cart
  • Designed specifically for healthcare professionals
Hand held monitor
monitor and breath bag


Do you bill insurances for medical services?

CPT Vertical33

Gastrolyzer® BREATH H2 / CH4 TEST

CPT Code: 91065 – Breath hydrogen/methane test (eg, for detection of lactase deficiency, fructose intolerance, bacterial overgrowth, or oro-cecal gastrointestinal transit).

Contact us for State Specific Reimbursement

Benefits to Practice & Patients

Benefits Title
480 benefits

Benefits to Practice

  • Low cost of study supplies
  • Reimbursable by insurance, average reimbursement $85.00
  • Maximize reimbursement by keeping testing in the office
  • Simple to use by staff
  • Lowest maintenance compared to other devices on the market
  • Rapid results – no need to send out of office, save money, and save time
  • Flexible sampling options: Mouthpiece sampling or take-home test kits (GastroCHECK only)
  • Interacts with GastroCHART™ patient management and database software – works with timers to assist with work-flow, manage studies and maximize reimbursement (up to 10 patients simultaneously)
480 benefits

Benefits to Patient

  • Non-invasive test for fast and accurate diagnosis and relief
  • Safe and simple test to perform – not physically strenuous – only requires patients to breathe
  • Covered by most insurance carriers
  • Simple prep – no need to drink a nasty tasting solution that will “clean you out”
  • Patient can go back to work after the test instead of taking a full sick day
  • Test managed by patient’s local Gastro office ensures faster & more reliable results
  • HBT test offers a starting point to craft a diet to assist in avoiding problematic foods

Simple Testing Process

Conducting a breath test is simple, non-invasive, and rapid results.


Schedule your patients for test


Patient performs breath test study


Rapid Results


Interpret Results & Devise a plan

GastroCHECK® CH4 & H2 Monitor

1. Upset Gut
2. Perform Study 1
3. Instant Results
4. Interpret Results 1

Gastro+ H2 Monitor

1. Upset Gut
2. Perform Study
3. Results
4. Interpret Results 1
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One monitor can do it all…..

Jade Gastro New

Why Breath CH4 & H2 test?

Ability to Detect & Manage Multiple Disorders

Hydrogen Breath Testing (HBT)

HBT is a non-invasive, and specific means of aiding in the diagnosis of small bowel sugar malabsorption. HBT makes use of gut bacteria’s ability to digest sugars and convert these to hydrogen & methane , which is then absorbed into the blood and can be measured in exhaled breath1.

The test is commonly used in adult and pediatric gastroenterology departments to aid in the diagnosis of malabsorption of the sugars lactose, fructose and sucrose etc. It is also used to investigate small intestinal bacterial overgrowth (SIBO)2. The Gastrolyzer® range is world renowned for delivering accurate hydrogen & methane breath testing, cited by clinical leaders in gastroenterology, such as Robert Heuschkel3 and Way Seah Lee4

Ability to Detect & Manage Multiple Disorders

  • SIBO
  • Intolerances & Malabsorption: lactose, fructose, sorbitol, sucrose, fructan, xylitol, etc.

Reimbursable/Revenue Stream

  • Average $85 – CPT Code: 91065 – Breath hydrogen/methane test (eg, for detection of lactase deficiency, fructose intolerance, bacterial overgrowth, or oro-cecal gastrointestinal transit)

Low Cost & Maintenance

  • Inexpensive consumables
  • Simple maintenance

Simple Testing

  • Easy to administer test. Breath testing is not regulated under C.L.I.A.


  • Works on a breath sample, no bodily fluids or medications required for test

Rapid Results

  • The monitor provides rapid results shown in parts per million (ppm) of Methane (CH4) & Hydrogen (H2) which makes interpreting a patient’s results quick and easy. No waiting for results from the lab.

Accurate & Reliable

  • 40+ year hydrogen breath test (HBT) heritage, shows it is reliable analytical method
  • Relied on by hospitals & research institutions for over 4 decades

Simple Test for Patients

  • Patients can return to work the same day
  • No special medication required to perform test


Small Intestinal Bacterial Overgrowth (SIBO)
Intolerances/Malabsorption Issues: lactose, fructose, sorbitol, sucrose, fructan, xylitol, & more

Gut Issue

Ideal for the following industries

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The Gastrolyzer®️ line is relied on by researchers at leading institutions to study functional gastrointestinal disorders.



Hydrogen (H2) and Methane (CH4) testing as a tool to aid in the diagnosis and management of functional gastrointestinal disorders…



Whether you’re utilizing our Gastrolyzers®️ in your own practice or you’re working with a physician group or hospital system to help consult…



Whether you’re utilizing our Gastrolyzers®️ in your own practice or you’re working with a physician group or hospital system to help consult…

raster (3)

Primary Care Physicians

Primary care physicians and their staff are uniquely positioned to be the first line of defense in helping to evaluate patients…


Naturopathic Doctors

ND’s work with their patients to prevent and treat acute and chronic illness and disease by emphasizing nature’s organic self-healing process, the vis medicatrix naturae.

Why is it important?

Girl Gaso Sick

The Gastrolyzer® hydrogen and methane breath test is a non-invasive way to assist doctors as an aid in the diagnosis and management of a number of conditions and disorders. One such condition the Gastrolyzer® tests for is lactose intolerance. Nearly 70% of the global population is intolerant to lactose. In the United States alone thirty to fifty million Americans are lactose intolerant. Additionally, the Gastrolyzer® can test for all these intolerances and malabsorption issues: fructose, sorbitol, sucrose, fructan, xylitol, & more. As well as testing for Small Intestinal Bacterial Overgrowth (SIBO).

About 30% of the world’s population are methane producers. These people produce methane because they have a specific species of archaea (a different type of organism from bacteria) in their gut called Methanobrevibacter Smithii that feeds on hydrogen produced in the gut which is then turned into methane, which is released into the gut and ultimately out into the breath. It takes 4 molecules of hydrogen to make 1 molecule of methane, which is why the methane breath measurement will typically be less than that of hydrogen, but has the same diagnostic implications. It is important to test for methane as well as hydrogen because people can have symptoms from the methane that is released into their gut, but it would go undetected if only hydrogen is measured. Methane slows down transit time by slowing the peristalsis reflex, which is the muscle that moves food along the digestive tract. Constipation is the most common clinical symptom of a methane producer. It has been found that there is a direct correlation between the amount of Methanobrevibacter Smithii in the gut, the amount of methane released in the breath, and the severity of the constipation.

Gastrolyzer® breath testing is inexpensive, non-invasive, and is a revenue stream for the practice. Plus, the test is easy on the patient, efficient, and is covered by most insurance carriers.

And since the results are immediate, the breath test allows doctors to arrive at a diagnosis quickly and accurately and allows patient to have better quality of life and gut health.

Hydrogen Breath Testing (HBT) is typically offered to patients reporting or with indications of the following clinical complaints or disorders (regardless of when these complaints occur):

Indications of GI symptoms: abdominal pain, nausea, vomiting, GI-bleeding, bloating, flatulence, constipation, diarrhea, steatorrhea, Chronic Inflammatory bowel disease, IBS (Irritable bowel syndrome), meteorism/tympanites (excessive flatulence), issues with oro-cecal transit time (slow or fast digestion), and intolerances/malabsorption to certain foods.

Indications of non-GI symptoms: muscle wasting, retardation of growth in children, weight loss, fatigue, dizziness, headaches, pale skin, a fast or irregular heartbeat, shortness of breath, chest pain, cognitive problems, cold hands and feet, fever.

Disorders suspected by physician: Crohn’s disease, cirrhosis of the liver, pancreatic insufficiency, ileocecal reflux, backwash ileitis, and anemia (due to malabsorption or Crohn’s disease).

Scientific Literature

 If you are interested in receiving supporting data, please contact us and we would be happy to search our archive of over 70+ years of research on breath analysis.

Contact Us

Frequently Asked Questions

What is the purpose of the Gastrolyzer® HBT test?

The purpose of the Hydrogen Breath Test (HBT) is to investigate unexplained gastrointestinal complaints that the patient is experiencing, such as bloating, gas, diarrhea, IBS, abdominal distention and pain, malnutrition, etc.

How does it work?

Using just a breath sample, this non-invasive test can help to determine if a patient has an intolerance to specific foods, detect and monitor these intolerances, as well as investigate a condition known as bacterial overgrowth.

How can you identify a problem just from testing a patient’s breath?

It’s very simple. When a patient has a problem digesting certain foods (or they have bacterial overgrowth), specific bacteria in their gut get exposed to the undigested food and create the gases, hydrogen (H2) and/or methane (CH4). These gases get absorbed into their blood, which then gets dumped into their lungs, and they breathe it out.

How accurate is this test?

Breath testing, and specifically HBT, has been around for over 40 years and the medical literature is very favorable regarding the accuracy of this test. As compared to other testing modalities such as cultured biopsy, the literature has demonstrated that HBT is an equally reliable analytical method.

What is the advantage of the test?

This test is similar to other diagnostic tests that you may order for the patient, but with the added advantage that it is non-invasive – the patient can be back at work ornormal activity the same day. As with any other test, HBT offers a view into the overall picture of the patients’ gastrointestinal health.

Is this test reimbursable?

Yes, using CPT code 91065. If the test is performed in the office and the physician interprets the results, you can be reimbursed the Global fee. You’ll use the one code regardless of which substrate/test (i.e. lactose, fructose, glucose for SIBO, etc.) that you are performing.

How many patients can I test simultaneously?

There is no specific limit to the number of patients that you can test simultaneously, however, there may be a limited number that you can manage effectively at one time. Generally, six patients at one time seems to be the most manageable number for one staff member to manage.

What is bacterial overgrowth?

Small Intestine Bacterial Overgrowth (SIBO), is a condition where a specific type of bacteria which are normally only present in the colon, overgrow into the small intestine. These bacteria should not be in the small intestine and if they are present, they will feed off of the food (carbohydrates) consumed daily and create many of the gastrointestinal problems that people experience.

Gastrolyzer® Breath H2 & CH4 Monitors



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212 Cottage Grove Ave, Suite C
Santa Barbara, CA 93101

Breath analysis is the new blood test