SIBO

Everything you need to know about SIBO. Learn about causes, symptoms, how to know if you have SIBO, and more.

What is SIBO?

SIBO (Small Intestinal Bacterial Overgrowth) is defined as the presence of excessive bacteria in the small intestine.

Usually, the majority of bacteria in our digestive system reside in the colon (large intestine). The small intestine is primarily responsible for nutrient absorption.

When abnormally high numbers of bacteria settle there, they can interfere with this process and cause various uncomfortable symptoms. These bacteria also consume the fermentable carbohydrates in our food, producing gas that causes bloating and pain.

Main causes

Several factors can contribute to the development of SIBO. Here is a list of several possible causes:

  • Disrupted intestinal motility: Slowed intestinal transit can allow bacteria to travel up from the colon to the small intestine and multiply there.
  • Anatomical abnormalities of the small intestine: Diverticula, strictures, or adhesions can create areas where bacteria can stagnate and proliferate.
  • Low stomach acid: Stomach acid plays an important role in destroying ingested bacteria. Insufficient production can allow more bacteria to survive and reach the small intestine.
  • Immune system disorders: A weakened immune system can have difficulty controlling the bacterial population in the small intestine.
  • Taking certain medications: Proton pump inhibitors (PPIs) or antibiotics can sometimes disrupt the intestinal bacterial balance.
  • Post-infectious syndrome: a set of symptoms that can appear after an infection (e.g., traveler’s diarrhea).
    Certain chronic diseases, such as Crohn’s disease, scleroderma, diabetes, etc., can be associated with SIBO.

What are the symptoms?

SIBO symptoms can vary considerably from person to person. However, here are the most common symptoms:

  • Abdominal bloating
  • Abdominal distension (swollen stomach after meals)
  • Excessive gas (flatulence and belching)
  • Abdominal pain or cramps
  • Diarrhea and/or constipation (sometimes alternating between the two)
  • Quickly feeling full after eating small amounts
  • Indigestion and heartburn
  • Nausea

In some cases, SIBO can also cause less specific symptoms such as:

  • Chronic fatigue
  • Brain fog
  • Nutritional deficiencies (particularly vitamin B12, iron, and fat-soluble vitamins)
  • Unintentional weight loss
  • Skin rashes (eg: rosacea, acne, eczema, etc.)
  • Food intolerances

Different types of SIBO

There are different types of SIBO. SIBO is classified based on the predominant gas produced by excess bacteria in the small intestine. The type of SIBO may influence the predominant symptoms and potentially the treatment approach.

The main types of SIBO are:

  • Hydrogen-Dominant SIBO (H2): This is the most common type of SIBO. It is caused by an overgrowth of bacteria that ferment carbohydrates and produce hydrogen. Typical symptoms include diarrhea, bloating, and flatulence.
  • Methane-Dominant SIBO (CH4): Also called IMO (Intestinal Methanogen Overgrowth). In this case, it is not bacteria but methanogenic archaea that are in excess. They consume the hydrogen produced by other bacteria and produce methane. Methane slows intestinal transit, which often manifests as constipation, bloating, and gas.
  • Hydrogen sulfide-Dominant SIBO (H2S): Also called ISO (Intestinal Sulfide Overproduction). This is characterized by overproduction of hydrogen sulfide by certain bacteria. Hydrogen sulfide can contribute to inflammation and symptoms such as diarrhea (sometimes with a rotten egg odor), bloating, and abdominal pain.

There also are other types of SIBO because of multiple combinations that exist. For example, you may have a mixed SIBO (H2 + CH4) where several types of gas are produced in excess (hydrogen + methane) or a SIFO (Small Intestinal Fungal Overgrowth) which indicates the presence of Candida albicans. SIFO can be combined with SIBO (co-infection) and includes the same symptoms as SIBO: bloating, gas, food intolerances.

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How is it diagnosed?

The diagnosis of SIBO is primarily based on a hydrogen and methane breath test. This test measures the amount of hydrogen and/or methane exhaled after ingesting a sugar solution (usually lactulose or glucose). An early and significant increase in these gases suggests abnormal bacterial growth in the small intestine.

Caution: Depending on where you perform your breath test, the results may be inaccurate.

Indeed, some doctors will measure breath every 20 minutes for 3 hours (the most reliable method), while others will ask you to return 2 hours after taking lactulose, which is less accurate. Therefore, I recommend the lactulose test because glucose can produce “false negatives.” Ingestion of the glucose solution is absorbed in the proximal intestine (first portions of the small intestine) and not in the distal part of the small intestine.

You also have possibility to use a breath test kit. To do so, you need to order your kit from a lab that does it. In this way, you can perform your SIBO test at home and send it back to the lab for analysis.

a SIBO Breath Test Kit
Example of a SIBO Breath Test Kit content © NaturoSIBO

How to treat SIBO?

First of all, you should know that  SIBO treatment can take several cycles. This can range from one to four treatment cycles. This will depend on the quantity of bacteria present in your microbiota, but also on the effectiveness of the treatment based on your personal situation.

Important: You should be aware that treating SIBO comes at a cost and it may be more or less expensive (supplements, cycles, etc.) according to your specific situation. Even though SIBO treatment can be expansive It should be seen as an investment in your health.

3 Steps Treatment

Relieve symptoms

First, the purpose is to relieve symptoms and reduce excessive bacterial proliferation

Treat your SIBO

Second, take a treatment to kill bacterias causing your symptoms.

Repairing the microbiota

Third, repair the damage and adopt habits to be sure that SIBO never comes back

There are several treatment approaches for treating SIBO. These mainly include:

Antibiotic therapy

Conventional antibiotics are one of the treatments given by doctors. The problem is that SIBO cannot be cured in the same way as some other illnesses. Indeed, allopathic medicine is not suitable for treating SIBO. The treatment involves several phases and cannot be cured with a “magic pill.”

Although antibiotic therapy length is shorter than herbal supplements, antibiotics will eliminate all bacteria without distinction. You will “temporarily” no longer have SIBO, but you will also eliminate the bacteria positioned in the right place and risk to further damaging your microbiota.
Furthermore, antibiotics are a major cause of microbiota disruption; this could be the possible cause of your SIBO.

Unlike antibiotics, herbal supplements can differentiate between bacteria in the wrong place, responsible for your digestive pain, and those in the right place.

Both approaches (conventional and natural) have proven their effectiveness, showing an 80% efficacy in treating SIBO.
In other words, Antibiotic therapy are no more effective than herbal supplements. To avoid further damage to your body, it’s better to favor herbal supplements.

Herbal supplements vary depending on your situation and the type of SIBO. The best known are:

  • Oregano
  • Neem
  • Allicin
  • Berberine
  • Atantril
  • Dysbiocide (or BiomeBalance)
  • Biotics Research FC Cidal
  • Metagenics Candibactin AR, Candibactin BR

Adopting a diet is a necessary step in treating SIBO.

Several diets exist:

  • Low FODMAP Diet (Fermentable by Colonic Bacteria Oligosaccharides, Disaccharides, Monosaccharides, and Polyols; Low FODMAP Diet)
  • Elemental Diet
  • Biphasic Diet
  • SCD Diet (Specific Carbohydrate Diet)
  • GAPS Diet (Gut and Psychology Syndrome)
  • SSFG Diet (SIBO Specific Food Guide)

By following these diets, you have a good chance of experiencing an improvement in your symptoms. However, as with most diets, they should not be followed for long periods of time, as this can lead to the development of nutritional deficiencies.

Let’s briefly explain what these diets are, their pros and cons:

You may have already heard of the low-FODMAP diet. This diet is often recommended by gastroenterologists when people have digestive problems. Its unique feature is that it avoids certain foods containing carbohydrates that can ferment in the intestine.

Pros of the low-FODMAP diet:

  • It’s the least restrictive diet
  • As it is very famous and there is a lot of information about it, including recipes, and more

Cons of the low-FODMAP diet:

  • The permitted complex sugars can sometimes aggravate SIBO
  • Following this diet long-term can have a negative effect on the gut microbiota

The Elemental Diet isn’t really a diet, but rather a treatment approach in its own right, just like antibiotics and herbal treatment. It’s a liquid, hypoallergenic formula of predigested nutrients mixed with water. Depending on your situation, this is the diet you might follow to treat your SIBO.

Pros of the Elemental Diet:

  • It is highly effective in treating SIBO (up to 85% success rate)
  • The treatment is short (2 to 3 weeks)

Cons of the Elemental Diet:

  • There is a risk of significant weight loss
  • The treatment is expensive

It’s a combination of the Low FODMAP and SCD diets that includes herbal supplement therapy. This is the diet I recommend for treating your SIBO.

Pros of Bi-phasic diet:

  • It effectively reduces digestive symptoms
  • It was created specifically for the treatment of SIBO
  • Structured format and available in several versions for people with histamine intolerance or vegetarian diets
  • It is comprehensive since it includes herbal supplement treatment

Cons of Bi-phasic diet:

  • Very restrictive diet (especially in Phase 1)
  • Significant risk of weight loss

These diets have been grouped together. They are less reputable, have less evidence of their effectiveness, and are not among the diets I use for the treatment of SIBO.

Here, however, are their specific features, pros and cons for your information.

The SCD diet eliminates carbohydrates to limit food fermentation.

Pros of the SCD diet:

  • It reduces digestive symptoms
  • It reduces inflammation

Cons of the SCD diet:

  • Very restrictive diet

The GAPS diet aims to reduce intestinal permeability and heal the gut.

Pros of the GAPS diet:

  • It restores the microbiota

Cons of the GAPS diet:

  • At this time, there is no evidence to support its effectiveness for SIBO

The SSFG diet reduces a variety of fermentables to relieve symptoms.

Pros of the SSFG diet:

  • Effective in reducing digestive symptoms (even in cases of severe symptoms)
  • It was created specifically for the treatment of SIBO

Cons of the SSFG diet:

  • Very restrictive diet

In addition to herbal supplements, you could use to take several dietary supplements with different uses that vary depending on your situation. This may include biofilm disruptors, digestive enzyme complexes, etc.

Moreover, you should be aware that dietary supplements should continue after the SIBO has cleared. Depending on your situation, this may include supplements that can restore the intestinal wall, restore the motility of the migrating motor complex (MMC), do a liver detox, etc.

Taking — adapted — probiotics is also recommended to repopulate your microbiota.

Support in SIBO treatment

As you can see, treating SIBO is not easy and requires support.

Finding a qualified person suited to SIBO treatment is a challenge because there are not a lot of trained professionals and approaches are often standardized. Even the treatments offered in hospitals and medical centers are not tailored to your needs; therefore, your SIBO won’t disappear with these non-personalized treatments.

My personal experience with SIBO allows me to understand your situation. I know the suffering you’re going through and how difficult it is to accept the medical woes.

Thanks to my research and targeted training, I managed to overcome SIBO. Today, I offer my expertise to provide you with natural and personalized support.

My goal is to permanently free you from your digestive problems so that you can regain an optimal quality of life!