Understanding Methane SIBO Symptoms: What You Need To Know

  • An excess of methane-producing bacteria in the small intestine is what distinguishes methane SIBO from other types of SIBO.
  • Some archaea present in methane-predominant SIBO are responsible for sudden weight gain.
  • A successful strategy for treating methane SIBO symptoms is dietary modification.

Methane SIBO Symptoms

Small Intestinal Bacterial Overgrowth, also known as SIBO, is a condition that affects the digestive system and can cause bloating, gas, and abdominal pain. SIBO can take many different forms, but methane-dominant SIBO is one of the most prevalent. A bacterial overgrowth that produces methane gas, the result of this type of SIBO, causes a number of unfavorable symptoms. To receive the appropriate diagnosis and treatment, one must be aware of the methane SIBO symptoms. This article will go over the symptoms of methane SIBO, how they differ from those of other types of SIBO, the reasons why it occurs, and the most effective cures. Therefore, if you're prepared to take charge of your digestive health, read on to find out more about the symptoms of methane SIBO and how to effectively treat them.

What is Methane SIBO?

An excess of methane-producing bacteria in the small intestine is what distinguishes methane SIBO from other types of SIBO. Certain types of bacteria that digest food in the gut release a gas called methane as a byproduct. Methane is a gas that is typically produced in small amounts in the gut and does not pose any health risks. However, the amount of methane produced is significantly higher than normal in people with methane-dominant SIBO, resulting in a variety of uneasy symptoms.

While methane SIBO symptoms can resemble those of other types of SIBO, there are some significant distinctions. Bloating, constipation, abdominal pain, and fatigue are some of the signs and symptoms of methane SIBO. Contrary to other forms of SIBO, methane-dominant SIBO is frequently accompanied by a slower rate of intestinal transit, which can result in more severe constipation and trouble passing stools.

Symptoms of Methane SIBO

Methane SIBO symptoms can be very uncomfortable and have a big effect on how well someone is able to live their life. Methane SIBO is frequently accompanied by the following symptoms:

1. Bloating: Bloating is a common symptom brought on by the distension of the abdomen brought on by the methane gas that the bacteria in the gut produce.

2. Constipation: Methane SIBO can cause more severe constipation that makes it challenging to pass stools. This is due to the slow intestinal transit time that is associated with this condition.

3. Abdominal pain: Abdominal pain, which can range in severity from mild to severe, can be brought on by the presence of excessive gas and pressure in the digestive system.

4. Fatigue: Long-term methane SIBO can result in malabsorption of nutrients, which can result in fatigue and other symptoms of nutrient deficiency.

5. Weight gain: Some archaea present in methane-predominant SIBO are responsible for sudden weight gain. These bacteria, also known as obesogens, help our food supply contain more calories than it initially did.

It's important to remember that not everyone with methane SIBO will experience all of these symptoms, and the degree to which they manifest varies from person to person.

How Methane SIBO differs from Hydrogen SIBO

While hydrogen-dominant SIBO is not as prevalent as methane-dominant SIBO, it does exist. The type of gas the gut bacteria produce makes up the main distinction between the two. Whereas methane-dominant SIBO produces methane gas, hydrogen-dominant SIBO produces hydrogen gas as a result of the bacteria.

As with methane-dominant SIBO, bloating, pain in the abdomen, and constipation are common symptoms of hydrogen-dominant SIBO. There are a few significant variations, though. For instance, hydrogen-dominant SIBO is frequently correlated with a quicker transit time in the gut, which may result in increased diarrhea and loose stools.

The kind of treatment that works best for each is a significant distinction between the two. Both types of SIBO are frequently treated with antibiotics, though the particular antibiotic used may differ depending on whether the SIBO is hydrogen- or methane-dominant.

Diagnosis of Methane SIBO

Getting a correct diagnosis is crucial if you have methane SIBO symptoms. In order to determine whether you have methane SIBO, your doctor may perform a number of tests, such as:

1. Breath Test

A breathalyzer test is one of the most popular methods for detecting methane SIBO. During this test, you'll need to chug a little bit of sugary liquid. Methane gas, which is detected in your breath as a result of the bacteria in your small intestine metabolizing the sugar, is produced. Methane SIBO may be present if there is a significant amount of methane in your breath.

2. Stool Test

A stool test to check for methane SIBO may also be advised by your doctor. A sample of your stool will be taken for this test, and it will be examined for indications of bacterial overgrowth. Even though the test's accuracy isn't as good as a breathalyzer's, it can still reveal important details about your digestive health.

3. Blood Test

To check for signs of malabsorption and nutritional deficiencies, your doctor may occasionally request a blood test. If your symptoms are caused by methane SIBO or another digestive disorder, this test can help identify the cause.

Treatment options for Methane SIBO

Methane SIBO can be effectively treated with a number of different approaches, which is fortunate. The following therapies may be suggested by your doctor:

1. Antibiotics

Treatment for methane SIBO frequently begins with antibiotics. These drugs work by eliminating the bacteria in your small intestine and lowering methane production. Rifaximin and neomycin are a couple of the most frequently prescribed antibiotics for methane SIBO.

2. Probiotics

Your gut microbiome can be balanced again with the aid of probiotics, which are good bacteria. Despite the fact that they might not be able to treat methane SIBO, they can support your digestive system as a whole. In addition to adding probiotic-rich foods to your diet, your doctor may advise taking a high-quality probiotic supplement.

3. Dietary Changes

A successful strategy for treating methane SIBO symptoms is dietary modification. A low-FODMAP diet, which forbids specific carbohydrates that might feed the bacteria in your small intestine, may be advised by your doctor. They might advise avoiding foods that are high in caffeine, alcohol, and sugar.

4. Lifestyle Modifications

Making lifestyle adjustments can aid in managing methane SIBO symptoms in addition to medical care and dietary changes. Consider these suggestions as helpful ones:

  • Consuming more little meals frequently throughout the day
  • To stay hydrated, consume lots of water.
  • By using relaxation methods like yoga or meditation, you can manage your stress.

Diet recommendations for Methane SIBO

Adhering to a particular diet that helps reduce the overgrowth of bacteria in the small intestine is one of the most crucial aspects of managing methane SIBO. For those with methane SIBO, the following diet suggestions:

Low FODMAP diet

The low FODMAP diet is a style of eating plan that forbids some carbohydrates that are hard to digest and may encourage the growth of bacteria in the small intestine. Monosaccharides, disaccharides, fermentable oligosaccharides, and polyols are a few of these. Wheat, onions, garlic, beans, lentils, and particular fruits are a few examples of high FODMAP foods that should be avoided.

Specific Carbohydrate Diet (SCD)

The SCD is another kind of diet that limits specific carbohydrate types because they can promote the growth of bacteria in the small intestine and are challenging to digest. The SCD does, however, also place limitations on specific sugars, including lactose and sucrose, unlike the low FODMAP diet. Grain, dairy products, and processed foods are a few examples of foods to stay away from when following the SCD.

Elemental diet

Consuming a liquid formula that is pre-digested to contain all the essential nutrients is part of the elemental diet. Since it starves the bacterial overgrowth in the small intestine, this diet is frequently used as a temporary cure for SIBO.

Foods to avoid

There are some foods you should stay away from if you have methane SIBO in addition to adhering to a particular diet. A few of these are:

High FODMAP foods

High FODMAP foods can be challenging to digest and can encourage an overgrowth of bacteria in the small intestine, as was previously mentioned. Onions, garlic, beans, lentils, wheat, and a few fruits are a few examples of foods high in FODMAPs that should be avoided.


Milk Some people, especially those who have lactose intolerance, may find it difficult to digest dairy products. Lactose, a type of sugar that can support the overgrowth of bacteria in the small intestine, is another ingredient that dairy products may contain.

Processed foods

An excessive amount of bacteria in the small intestine can grow due to the added sugars and artificial ingredients that are frequently found in processed foods. Keep as much of your diet as possible focused on whole, unprocessed foods.

Lifestyle changes to manage Methane SIBO

You can manage methane SIBO by changing your lifestyle in addition to adhering to a particular diet and using natural remedies. A few of these are:

  • Stress management: Stress can negatively affect digestion because it slows down the process and upsets the normal balance of bacteria in the gut. In order to reduce stress, it's crucial to practice deep breathing techniques, yoga, or meditation.

  • Exercise: Constipation, which is a typical methane SIBO symptom, can be reduced and improved with regular exercise. On the majority of days of the week, aim for at least 30 minutes of moderate exercise.

  • Sleep: Sleep is important for digestive health as well as general well-being. Get 7-8 hours of sleep every night, minimum.

Methane SIBO and other digestive disorders

Irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD) are just two examples of the digestive disorders that methane SIBO frequently masquerades as. In order to receive a proper diagnosis, it is crucial to work with a healthcare provider. Furthermore, since IBS and IBD frequently make the symptoms of methane SIBO worse, it's crucial to receive proper treatment for those conditions as well.


Small intestinal bacterial overgrowth (SIBO) resulting in methane is a common type that develops when methane-producing bacteria overgrow in the gut. Methane SIBO symptoms can be very uncomfortable and have a big effect on how well someone is able to live their life. It's crucial to consult your doctor and receive the proper diagnosis and treatment if you are exhibiting symptoms of SIBO, such as bloating, gas, or abdominal pain.

Methane SIBO can be treated with a variety of approaches, such as dietary modifications, probiotics, and antibiotics. Based on the individual and the severity of their symptoms, the best treatment strategy will be chosen. Methane SIBO symptoms can be successfully managed, and digestive health can be improved, with the appropriate management and treatment strategy.


  1. Cohen, M. (2022, November 27). Methane Methane SIBO and Constipation: 2023 Guide. The IBS & Gut Health Clinic. https://ibsguthealthclinic.co.uk/methane-sibo/ ‌


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