How to Read and Interpret SIBO Breath Test Results: Hydrogen, Methane and IMO

Category: Blog | SIBO
Published: July 14, 2026
Author: Victoria Tyler
Medical technician swabbing a test dish parasite test

You have completed a SIBO breath test, received your results and perhaps seen a graph full of hydrogen and methane readings. You may have been told that your result is “positive”, but still feel unsure about what that actually means for your symptoms.

You are not alone. SIBO breath-test reports can look technical, and the wording used by laboratories is not always easy to understand.

A breath test can be useful when you have symptoms such as bloating, abdominal discomfort, trapped wind, nausea, constipation, loose stools or digestive symptoms after eating. However, the result needs to be interpreted in context.

Your highest hydrogen number does not automatically tell you how severe your symptoms should be. A positive test also does not prove that every digestive symptom you have is caused by SIBO.

The most helpful interpretation looks at the full pattern of your test: when your gases rise, whether hydrogen or methane is dominant, your bowel habit, how well you prepared for the test and your transit time such as constipation or loose stools.

Quick answer

Under North American criteria, a hydrogen rise of 20 ppm or more above baseline within the first 90 minutes is considered positive for SIBO.

European guidance is less uniform. Some European centres use a lower hydrogen cut-off, often around 10–12 ppm, and place greater emphasis on whether the rise occurs before the test solution is likely to have reached the colon. This means the timing of the rise, the type of test solution used and your likely intestinal transit time all need to be considered.

For methane, a level of 10 ppm or more at any point during the test, including at baseline, is generally considered positive for intestinal methanogen overgrowth, or IMO. This term is used because methane is produced by methanogens rather than bacteria, and these organisms may be present in both the small and large intestine.

European vs. North American SIBO/IMO Criteria

Diagnostic MetricEuropean ConsensusNorth American Consensus
Testing Window40 to 60 minutes90 minutes
Hydrogen (H₂) Rise≥ 10–12 ppm over baseline≥ 20 ppm over baseline
Glucose Dosage50 grams75 grams
Methane (CH₄) for IMOOften uses ≥ 10 ppm locally≥ 10 ppm at any time point



What is a SIBO breath test?

A SIBO breath test is a simple, non-invasive test that looks for gases produced by microbes in your digestive tract.

During the test, you drink a solution containing either lactulose or glucose. You then breathe into collection tubes or bags at regular intervals, usually over two to three hours.

The laboratory measures gases in your breath, most commonly:

  • Hydrogen
  • Methane
  • Sometimes carbon dioxide, which can help show whether you gave a good-quality breath sample

When microbes ferment carbohydrates, they can produce gases such as hydrogen and methane. These gases are absorbed through the gut wall into the bloodstream, carried to the lungs and then released in your breath.

The timing and amount of gas produced can give useful clues about where fermentation may be happening in your digestive system. However, the test does not directly look inside the small intestine or count the bacteria there.

What does a positive SIBO breath test mean?

A positive result means that the breath-test pattern is consistent with increased microbial fermentation in the small intestine.

However, the test cannot directly see what is happening inside your gut or measure the type or number of bacteria there. It provides useful information, but it is not a complete answer on its own.

Your result is easiest to understand when it is looked at alongside your symptoms, bowel habit, test preparation and wider health history.

The most commonly used North American criteria are:

  • Hydrogen-positive: a rise in hydrogen of at least 20 ppm above baseline within 90 minutes
  • Methane-positive: methane of 10 ppm or more at any point during the test

Methane positivity is usually described as intestinal methanogen overgrowth, or IMO, rather than methane-SIBO. This is because methane is produced by methanogens, which are archaea rather than bacteria. Methanogens can be present in both the small and large intestine.

For example, if your hydrogen starts at 5 ppm and rises to 30 ppm at 80 minutes, this is a 25 ppm increase. Because the rise happened within 90 minutes, it meets the commonly used North American threshold for a hydrogen-positive result.

A positive breath test should not be treated as a diagnosis on its own. It is most meaningful when the result also fits with your symptoms, bowel pattern, risk factors and medical history.

How to Read Your SIBO Breath-Test Graph in Five Steps

A SIBO breath-test graph can look complicated at first, but you can begin interpreting it by working through the hydrogen and methane readings in a logical order.

1. Find your baseline hydrogen and methane levels

Start with the first breath sample, which is taken before you drink the glucose or lactulose solution. This gives you your baseline hydrogen and methane readings.

A raised baseline can make the test more difficult to interpret. It may sometimes reflect fermentation that was already occurring before the test began, but it can also be affected by test preparation, slow intestinal transit or gas produced by bacteria in the mouth. A high baseline does not diagnose SIBO on its own.

2. Calculate the hydrogen rise above your baseline

Do not look only at the highest hydrogen number on the graph. You need to calculate how much the hydrogen level has risen above the starting value.

For example, if your baseline hydrogen level is 5 ppm and it reaches 27 ppm, the rise is 22 ppm.

Under commonly used North American criteria, a hydrogen rise of at least 20 ppm above baseline within the first 90 minutes is considered positive for SIBO.

3. Check when the hydrogen rise occurred

The timing of the rise is just as important as its size. An early hydrogen rise may suggest fermentation in the small intestine, while a rise later in the test may occur after the glucose or lactulose has reached the large intestine.

A late rise is therefore not automatically evidence of SIBO. This is particularly important with lactulose testing because lactulose continues into the colon, where normal gut bacteria produce hydrogen.

Transit time also varies from person to person. If lactulose moves rapidly through the small intestine, colonic fermentation may begin earlier and resemble a positive SIBO pattern.

4. Look for methane of 10 ppm or more

Methane is interpreted differently from hydrogen. A methane reading of 10 ppm or more at any point during the test, including at baseline, is generally considered methane-positive.

This is more accurately described as intestinal methanogen overgrowth, or IMO, because methane-producing organisms can be present in both the small and large intestine.

Methane production can also affect the hydrogen reading. Methanogens use hydrogen to make methane, so you may have a relatively modest hydrogen rise but still have a clinically relevant methane result. This is why hydrogen and methane should be interpreted together.

5. Look at the overall shape of the graph

Finally, consider the overall pattern rather than focusing on one result.

An early rise may be consistent with small-intestinal fermentation. A late rise may represent normal fermentation in the colon. A flat-line result means that hydrogen and methane remain very low throughout the test, but this does not necessarily rule out all forms of microbial overgrowth.

You should also consider whether the result may have been affected by preparation, sample collection, rapid or slow transit, constipation, recent medication use or the type of test solution used.

A breath-test graph should therefore be interpreted alongside your symptoms, bowel habits, medical history and the laboratory’s testing protocol. The numbers can provide useful information, but they should not be used in isolation to diagnose the cause or severity of your digestive symptoms.

Why do different SIBO laboratories use different cut-offs?

You may notice that different laboratories use different rules when interpreting a SIBO breath test.

European guidance indicates that an early rise in hydrogen may suggest SIBO. European consensus shortens the window to 60 minutes, this may reduce false positives as when the test sugar enters the large intestine it will cause colonic fermentation.

This matters particularly with lactulose testing. Lactulose eventually reaches the large intestine, where it is normal for gut microbes to ferment it and produce gas.

European guidance allows both glucose and lactulose breath tests. Glucose is absorbed earlier in the small intestine, so it may miss fermentation further down the bowel. Lactulose travels through the small intestine and into the colon, but it can be harder to interpret if it reaches the large intestine quickly.

Neither set of guidance makes the breath test completely exact. The North American approach gives laboratories a clear cut-off to use when reporting results. European guidance highlights that the timing of the gas rise can be affected by how quickly the test drink moves through your gut.For this reason, your result should not be interpreted from the numbers alone. It is also important to consider when your gases rise, your bowel habit, your symptoms, how well you prepared for the test and whether fast or slow gut transit may be affecting the result. Working with a SIBO specialist is key to ensuring you are interpreting your results properly.



What is a high hydrogen level on a SIBO test?

Hydrogen is produced when certain gut microbes ferment carbohydrates.

If you have a clear early rise in hydrogen, this may suggest that fermentation is happening earlier in your digestive tract than expected. This may be linked to symptoms such as bloating, abdominal pressure, excessive wind, discomfort after meals, nausea, loose stools or urgency.

However, it is important not to assume that a larger hydrogen rise means you have “more severe” SIBO.

For example, a person whose hydrogen rises by 30 ppm may have significant bloating and pain, while another person with a rise of 90 ppm may have relatively mild symptoms.

Your symptoms depend on many factors, including how quickly food moves through your gut, whether you are constipated, how sensitive your gut is to gas and stretching, your diet, stress levels and the balance of different microbes in your digestive tract.

Your peak hydrogen number is not a validated severity score. It is more useful to look at whether your result meets the diagnostic threshold, when the rise occurs and whether the pattern fits with your symptoms.

What does high methane mean on a SIBO test?

Methane is produced by methanogens, not bacteria. If your methane reaches 10 ppm or more at any point during the test, this is commonly interpreted as methane-positive or consistent with IMO.

A high methane result on a SIBO breath test suggests that you have an overgrowth of methane-producing microorganisms in your gut. Although this is commonly referred to as “methane SIBO,” methane is actually produced by archaea rather than bacteria, so the condition is now more accurately called intestinal methanogen overgrowth (IMO). Unlike hydrogen, which is produced only when bacteria ferment carbohydrates, methane is created when methanogens use hydrogen as a fuel source. This means some people with methane overgrowth may have only a small rise in hydrogen despite having a clinically significant methane result. High methane levels are strongly associated with slower bowel movements and constipation because methane appears to reduce the speed at which food moves through the intestines. However, not everyone with methane has constipation, and some people experience bloating, abdominal discomfort, excessive gas, or a combination of constipation and diarrhoea. A methane-positive breath test should always be interpreted alongside your symptoms and medical history so that the most appropriate treatment plan can be chosen.

You may be more likely to have a methane-positive pattern if you experience:

  • Constipation or skipping days between bowel movements
  • Hard, dry or difficult-to-pass stools
  • A feeling that you have not fully emptied your bowels
  • Straining when opening your bowels
  • Bloating that becomes worse as the day goes on
  • Fullness

Methane can also affect your hydrogen result. Some methanogens use hydrogen to make methane. This means you may have a relatively modest hydrogen rise but still have a clinically relevant methane result.

A mild methane elevation should still be interpreted carefully. A result of 10–15 ppm technically meets the usual threshold, but it does not automatically mean that methane is the main driver of your symptoms. Your bowel habit is particularly important here.

Methane is linked to constipation, sluggish bowel movements, hard stools, straining or incomplete evacuation.

Are SIBO tests accurate?

A SIBO breath test is currently the best non-invasive test available, but it is not 100% accurate.

A 2020 systematic review and meta-analysis found that the glucose breath test correctly identified around 55% of people with SIBO and correctly excluded about 83% of people without the condition.

The lactulose breath test had a lower sensitivity of around 42% and a specificity of approximately 71%. These figures mean that both false-positive and false-negative results can occur.

Factors such as rapid or slow gut transit, recent antibiotics, medications, and poor test preparation can all affect the results. For this reason, experienced clinicians interpret your breath test alongside your symptoms, medical history, and risk factors rather than relying on the test result alone.

Some people have faster gut transit, particularly if they tend towards diarrhoea or urgency.This can cause an early rise that could be mistaken for small-intestinal fermentation and produce a false-positive.

Breath tests can occasionally produce false-positive or false-negative results, which is why they should never be interpreted in isolation. Instead, an experienced practitioner will consider your symptoms, medical history, risk factors, and, where appropriate, other investigations before deciding whether SIBO is likely to be present and whether treatment is appropriate.

What does a late rise on a SIBO breath test mean?

A late rise in hydrogen or methane is more likely to represent fermentation in the large intestine.

This is often a normal finding, especially with lactulose testing. Your colon naturally contains a large number of microbes, and when lactulose reaches the colon, fermentation is expected.

For example, if your hydrogen remains low until 120–140 minutes and then rises sharply, this may simply show that lactulose has reached your large bowel.

A late rise alone does not usually confirm SIBO, particularly on a lactulose breath test.

What does a high baseline result mean?

Your baseline reading is the first breath sample you provide before drinking lactulose or glucose.

A high baseline can occur for several reasons, including:

  • Incomplete preparation before the test
  • Eating high-fibre or fermentable foods the day before
  • Not fasting for long enough
  • Smoking before the test
  • Exercising vigorously before testing
  • Oral bacteria contributing to hydrogen production
  • Constipation or slow transit
  • Genuine intestinal fermentation

A raised baseline does not automatically invalidate the test, but it can make a small rise harder to interpret. Laboratories may repeat the baseline sample, check that the breath sample is adequate or advise a repeat test if preparation appears likely to have affected the result.

Preparation matters because even a small amount of fermentable food can affect your starting readings and alter the shape of your graph.

This is why it is important to follow the laboratory’s preparation instructions carefully. You may be asked to avoid certain foods, alcohol, probiotics, laxatives or antibiotics for a specified period before the test.

Can you have a negative SIBO test but still have symptoms?

Yes. A negative breath test does not mean that your symptoms are not real or that there is nothing else to investigate.

Bloating, pain, wind, constipation, loose stools and food-related symptoms can occur for many reasons. These may include IBS, gut dysbiosis, candida, coeliac disease, food intolerances lactose or fructose malabsorption, bile acid diarrhoea, constipation, pelvic floor dysfunction, endometriosis, medication side effects, thyroid conditions, inflammatory bowel disease, pancreatic problems or functional dyspepsia.

This is why a negative result should be interpreted alongside your symptoms and medical history, rather than being seen as the end of the investigation.

What is hydrogen sulphide SIBO?

Hydrogen sulphide is a third gas that is measured by some newer breath-test systems in USA.

It is possible that some microbes use hydrogen to produce methane or hydrogen sulphide.

Some early research has linked higher hydrogen sulphide readings with diarrhoea-predominant symptoms. However, hydrogen sulphide testing is still developing and there is currently less agreement about how results should be interpreted than there is for hydrogen and methane.

A flat hydrogen-and-methane test should not automatically be labelled hydrogen sulphide SIBO. It may be one reason why symptoms and standard breath-test results do not always match perfectly, but other possible causes should still be considered.

What is a High SIBO Score and reading?

There is no single number that is officially classified as a “high SIBO score.” A hydrogen breath test is considered positive when hydrogen rises by at least 20 ppm above the starting level within the first 90 minutes. A methane level of 10 ppm or more at any point during the test is considered methane-positive. Higher gas readings may indicate greater gas production, but they do not reliably show how severe your symptoms are or how difficult the overgrowth will be to treat. The timing and overall pattern of the results are more important than the highest number alone.

Does a positive SIBO test mean you need treatment?

Not always.

A positive breath test is most useful when it fits with your symptoms and clinical history. If you have significant bloating, pain, diarrhoea, constipation, nausea, food-related symptoms or signs of malabsorption, treatment may be appropriate. However, the decision should be individual.

A good treatment plan should not focus only on reducing your breath-test numbers. It should also consider why the pattern may have developed in the first place.

This may include looking at:

  • Constipation or incomplete evacuation
  • Slow gut motility
  • Previous food poisoning or post-infectious IBS
  • Use of acid-suppressing medication
  • Thyroid function
  • Coeliac screening where appropriate
  • Abdominal or pelvic surgery
  • Diabetes or connective-tissue conditions
  • Diet, meal pattern and food tolerance
  • Stress and the gut-brain connection

Antibiotics and herbal antimicrobials such as Oregano oil for SIBO may be required.

Why does SIBO come back?

It is common for symptoms to improve after treatment however SIBO can return months later.

This does not necessarily mean that treatment failed. It may mean that the underlying driver has not been fully addressed.

For example, if you have constipation, slow transit or poor small-intestinal motility, microbes may have more opportunity to remain or build up in the small intestine.

If you regularly use acid-suppressing medication, have had abdominal surgery, have a thyroid condition or have ongoing post-infectious gut symptoms, these factors may also need attention.

After treatment, it can be helpful to focus on regular bowel movements, meal spacing where appropriate, gradually increasing dietary variety when tolerated and addressing factors that may be slowing down digestion.

The goal is not simply to produce a negative breath test. The goal is to help you feel better, improve your bowel pattern and reduce the chance of symptoms returning.

Can you get a false-negative SIBO breath test?

Yes. It is possible to have a negative SIBO breath test even when you still have symptoms that suggest a problem with fermentation, motility or the small intestine.

A negative result means that your hydrogen and methane readings did not meet the laboratory threshold used for a positive test. It does not completely rule out SIBO, and it does not rule out other digestive causes of bloating, pain, constipation, diarrhoea or food-related symptoms.

There are several reasons why this can happen.

The test sugar may not reach the relevant area

Glucose is absorbed quite quickly in the upper part of your small intestine.

This can make glucose breath testing more specific in some situations, but it also means that it may miss microbial overgrowth further down the small bowel.

If the glucose has already been absorbed before it reaches the area where increased fermentation is happening, there may be very little gas produced during the test. Your hydrogen and methane levels may then stay low.

This is one reason why glucose breath testing can occasionally give a false-negative result.

Your gut may produce gases that are not being measured

Most standard SIBO tests measure hydrogen and methane. They do not usually measure hydrogen sulphide.

Some microbes can use hydrogen to produce other compounds, including hydrogen sulphide. This means you may have a low or “flat” hydrogen-and-methane pattern but still experience symptoms such as bloating, abdominal discomfort, loose stools, urgency or strong-smelling gas.

However, a flat two-gas test should not automatically be labelled hydrogen sulphide SIBO. Other explanations still need to be considered.

Slow stomach emptying may delay the gas rise

If your stomach empties slowly, the lactulose or glucose drink may take longer than expected to reach the small intestine.

This can delay fermentation and push the gas rise later into the test.

If a test finishes before the drink reaches the relevant area of the small intestine, the result may appear negative even though gas may have risen later. This may be more relevant if you have nausea, early fullness, reflux, vomiting, diabetes, known gastroparesis or a history of very slow digestion.

Recent medications may affect the result

Antibiotics, herbal antimicrobials, bowel preparations, laxatives and some medicines can change gut microbes, transit or gas production and may affect the result.

This is why it is important to follow the laboratory preparation instructions closely and to tell your practitioner about recent medication, supplements and treatment.

The pre-test diet is designed to reduce background fermentation and make the result easier to interpret. It is important not to extend the restriction unnecessarily unless your laboratory has advised you to do so.

The cut-off may not capture every pattern

Breath tests use fixed cut-offs, such as a hydrogen rise of at least 20 ppm within 90 minutes.

These thresholds are useful for standardising results, but the digestive system does not always behave in such a neat way.

You may have symptoms and a suggestive but borderline curve that does not technically cross the threshold. You may also have day-to-day variation in gut transit, bowel habit, diet and microbial activity, so one test is only a snapshot of what happened on that day.

Glucose and lactulose tests do not always identify the same people as positive. This reinforces that the test substrate used can influence the pattern seen.

Your symptoms may have another cause

A negative SIBO test can also be useful because it encourages you to look beyond SIBO.

Symptoms such as bloating, trapped wind, constipation, diarrhoea and abdominal pain can also occur with IBS, coeliac disease, lactose or fructose malabsorption, bile acid diarrhoea, pelvic floor dysfunction, endometriosis, thyroid disorders, inflammatory bowel disease, pancreatic insufficiency, medication side effects and functional dyspepsia.

A negative result does not mean that there is “nothing wrong”. It means that the test has not shown a clear hydrogen- or methane-positive pattern under the conditions in which it was performed.

Can you get a false-positive SIBO breath test?

Yes. It is possible for a SIBO breath test to appear positive even when the rise in gas is not caused by microbial fermentation in the small intestine.

This is one of the main reasons a result should be interpreted alongside your symptoms, bowel habit, preparation and medical history.

A positive breath test can be helpful, but it does not automatically prove that SIBO is the cause of your symptoms.

Rapid gut transit can make a lactulose test look positive

This is one of the most important reasons for a false-positive lactulose breath test.

Lactulose is not absorbed by your small intestine. It travels through your digestive tract until it reaches the large bowel, where fermentation is normal.

Once it reaches your colon, gut microbes ferment it and produce hydrogen and methane.

The difficulty is that some people move lactulose through the small intestine more quickly than others. If lactulose reaches the colon before the 90-minute cut-off, the normal colonic gas rise may be mistaken for early small-intestinal fermentation.

This may be more likely if you tend towards diarrhoea, urgency, rapid transit or some forms of IBS.

Poor preparation can affect the result

Your preparation before the test matters.

If you eat high-fibre or fermentable foods too close to the test, do not fast for long enough, smoke, exercise vigorously, chew gum or take certain supplements or medication against the laboratory instructions, your baseline gas readings may be raised or the graph may be harder to interpret.

A high baseline does not automatically mean your test is false-positive, but it can make it harder to know whether the gas is coming from the small intestine, large intestine, mouth or incomplete preparation.

Oral bacteria can contribute to an early hydrogen rise

Hydrogen can be produced by bacteria in the mouth as well as in the gut.

For this reason, many testing protocols advise brushing your teeth, rinsing your mouth or using an antiseptic mouthwash before the test, depending on the laboratory’s instructions.

Lactulose and glucose tests have different limitations

Lactulose can give useful information because it continues through the small intestine and into the colon. However, because it is affected by transit time, it can be more difficult to interpret when gut transit is rapid.

Glucose is absorbed in the upper small intestine, so it is less likely to produce an early colonic rise. However, glucose may miss fermentation further down the small intestine.

Neither test is perfect. The best choice depends on your symptoms, bowel pattern, risk factors and clinical history.

A positive result may not be the cause of your symptoms

You can have a technically positive breath test and still have symptoms that are mainly due to another condition.

For example, bloating, pain, constipation, loose stools and food-related symptoms can also occur with IBS, candida, constipation, pelvic floor dysfunction, coeliac disease, bile acid diarrhoea, endometriosis, thyroid conditions, medication side effects, inflammatory bowel disease or functional dyspepsia.

This does not mean a positive breath test should be ignored. It means you should avoid assuming that the test explains everything, especially if your symptoms do not fit the hydrogen or methane pattern or treatment does not improve how you feel.

Confused about how to read and interpret your SIBO test?

Book a consultation with our sister clinic – ibs-solutions.co.uk

Victoria Tyler specialises in SIBO and will be able to help you interpret results and discuss diet and treatment.

Frequently asked questions about SIBO test results

What is a positive hydrogen SIBO result?

The most commonly used North American criteria define a positive hydrogen result as a rise of 20 ppm or more above baseline within 90 minutes.

However, the timing of the rise, the test used, your symptoms and your bowel habit all matter when interpreting the result.

Is methane of 10 ppm always IMO?

Methane of 10 ppm or more at any point technically meets the usual threshold for methane positivity or IMO.

However, it does not automatically mean that methane is the main cause of your symptoms. Methane results are most relevant when they fit with constipation, hard stools, straining or incomplete evacuation.

Can a SIBO breath test be falsely positive?

Yes. A lactulose breath test can appear positive if lactulose reaches the large intestine quickly and normal colonic fermentation happens before the usual test cut-off.

Poor preparation, raised baseline readings and oral bacteria can also make a result harder to interpret.

Can a SIBO breath test be falsely negative?

Yes. Glucose may miss fermentation further down the small intestine because it is absorbed earlier. Slow stomach emptying, recent antimicrobial treatment and gases that are not measured on a standard test may also affect the result.

Does a high hydrogen number mean severe SIBO?

No. A high hydrogen peak is not a validated measure of how severe SIBO is or how severe your symptoms should be.

Some people with modest rises have significant symptoms, while others with higher readings may feel relatively well.

What does a late rise on a lactulose breath test mean?

A late rise usually suggests that lactulose has reached the large intestine, where fermentation is normal.

A late rise alone does not usually confirm SIBO.

What is the difference between SIBO and IMO?

SIBO relates to bacterial fermentation in the small intestine.

IMO relates to methane production by methanogens, which can be present in both the small and large intestine. This is why methane positivity is called IMO rather than methane-SIBO.

The bottom line

Your SIBO breath test can provide useful information, but the numbers need to be interpreted in context.

A helpful interpretation considers:

  • Whether hydrogen rises by at least 20 ppm within 90 minutes
  • Whether methane reaches 10 ppm or more
  • Whether your graph rises early or late
  • Your symptoms and bowel habit
  • Your preparation before the test
  • Whether constipation or slow transit may be contributing
  • Whether rapid transit may be affecting a lactulose result
  • Other possible explanations for your symptoms
  • Why symptoms may have developed or returned

A high hydrogen peak does not automatically mean severe SIBO. A methane-positive result does not automatically mean methane is causing all your symptoms. A negative test does not mean that your digestive symptoms are not real.

The most useful next step is to understand what your particular pattern may mean for you, rather than treating the graph in isolation.

Need help interpreting your SIBO test results?

If you have received a SIBO breath test and are unsure what the numbers mean, a consultation can help you understand your hydrogen and methane pattern in the context of your symptoms, bowel habit, diet, medical history and possible causes of recurrence.

A personalised plan can then focus on symptom relief, bowel regularity, treatment options and reducing the risk of symptoms returning.

Book a consultation today at our sister clinic the IBS and Gut Disorder Clinic

Author – Victoria Tyler BSc Hons MBANT

Victoria Tyler owns and runs two busy clinics : Nutrition and Vitality and the IBS and Gut Disorder Clinic.

Nutrition and Vitality, along with the IBS and Gut Disorder Clinic, were founded with the goal of helping patients alleviate IBS symptoms by uncovering and addressing the root causes of their digestive issues.

As a Registered Nutritional Therapist, Victoria holds a BSc (Hons) in Nutritional Therapy and has trained with the Institute of Functional Medicine. She is also accredited by BANT and CNHC.

Before transitioning into health, Victoria earned a degree in Economics and an MBA, working with corporations including Canon and Vodafone. However, her own health challenges led her to pursue a career in Nutritional Therapy.

With a passion for learning, Victoria is committed to staying at the forefront of Functional Medicine. She helps patients manage IBS and other digestive disorders, including SIBO, Candida, and IBD, by identifying and addressing their root causes.

Victoria strongly believes that every symptom has an underlying cause, and there is always a solution to every health condition. To learn more, or to see patient reviews, visit Victoria’s profile on Google.

DISCLAIMER: The information provided in this article is intended for general informational purposes only and should not be construed as medical advice, diagnosis, or treatment. The products and methods mentioned are not a substitute for professional medical advice from a trained healthcare specialist. Always seek the guidance of your doctor or other qualified health professional with any questions you may have regarding your health or a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website. Use of the information and products discussed is at your own risk.

References

  1. Hammer HF, Fox MR, Keller J, et al. European guideline on indications, performance and clinical impact of hydrogen and methane breath tests in adult and paediatric patients. United European Gastroenterology Journal. 2022;10(1):15–40.
  2. Rezaie A, Buresi M, Lembo A, et al. Hydrogen and methane-based breath testing in gastrointestinal disorders: The North American Consensus. American Journal of Gastroenterology. 2017;112(5):775–784.
  3. Pimentel M, Saad RJ, Long MD, Rao SSC. ACG Clinical Guideline: Small Intestinal Bacterial Overgrowth. American Journal of Gastroenterology. 2020;115(2):165–178.
  4. Quigley EMM, Murray JA, Pimentel M. AGA Clinical Practice Update on Small Intestinal Bacterial Overgrowth: Expert Review. Gastroenterology. 2020;159(4):1526–1532.
  5. Tansel A, Levinthal DJ. Understanding our tests: Hydrogen-methane breath testing to diagnose small intestinal bacterial overgrowth. Clinical and Translational Gastroenterology. 2023;14.
  6. Kashyap P, Moayyedi P, Quigley EMM, Simrén M, Vanner S. Critical appraisal of the SIBO hypothesis and breath testing: A clinical practice update endorsed by the European Society of Neurogastroenterology and Motility and the American Neurogastroenterology and Motility Society. Neurogastroenterology and Motility. 2024;36(6).

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