Understanding SIBO: Small Intestinal Bacterial Overgrowth

Aug 2024 | Dr. Ashley Southern

Small Intestinal Bacterial Overgrowth, commonly known as SIBO, is a condition that’s gained increasing attention due to its role in a wide array of gastrointestinal issues. It occurs when there’s an abnormal increase in bacterial growth within the small intestine. Normally, this part of the digestive system contains fewer bacteria than the large intestine, but in cases of SIBO this balance is disrupted, leading to a range of digestive problems and broader health concerns.

What Happens in SIBO?

To understand SIBO, it’s helpful to start with a basic understanding of how our digestive system works. The small intestine plays a crucial role in digestion, as it’s responsible for the absorption of most nutrients we get from our diet. Typically, a limited number of bacteria reside in the small intestine. These bacteria are essential for a healthy digestive system, aiding in the digestion and absorption of our food.

However, in SIBO the bacterial population within the small intestine becomes excessively high. This overgrowth can lead to significant disruptions in the digestive process. The bacteria begin to ferment undigested food, particularly carbohydrates, which leads to the production of gases such as hydrogen and methane, and even sulfide in some cases. This excessive gas is one of the key factors behind many of the uncomfortable symptoms associated with SIBO.

Symptoms: What Does SIBO Feel Like?

The symptoms of SIBO can vary, but they often share a common theme: discomfort. One of the hallmark symptoms of SIBO is bloating, which is often severe and persistent. Bloating is typically accompanied by excessive gas, which can be embarrassing and uncomfortable. Many people with SIBO also experience abdominal pain or discomfort, which can range from mild to severe.

Changes in bowel habits are another common feature of SIBO. Some individuals may experience chronic diarrhea, while others may struggle with constipation. In some cases, people alternate between the two. These symptoms can be particularly frustrating because they often resemble other digestive disorders, which can make SIBO a challenge to diagnose.

Beyond digestive symptoms, SIBO can also lead to malnutrition. The overgrowth of bacteria in the small intestine can interfere with and prevent the absorption of essential nutrients, leading to deficiencies in vitamins and minerals. This can result in a range of secondary symptoms, including fatigue, weakness, and weight loss. In some cases, people with SIBO may lose weight unintentionally, despite eating normally or even overeating.

The Causes: Why Does SIBO Occur?

SIBO can develop for a variety of reasons, often related to underlying conditions or lifestyle factors that disrupt the normal functioning of the digestive system. One of the most common causes of SIBO is reduced motility, or movement, of the small intestine. The small intestine is designed to move food and bacteria through the digestive tract in a coordinated manner. Certain conditions, like diabetes and constipation, can slow down this process and allow bacteria to accumulate in the small intestine.

Structural abnormalities in the small intestine can also contribute to SIBO. These abnormalities might be due to scar tissue, inflammation, or changes due to surgery. These conditions can create an environment where bacteria thrive and overpopulate. Similarly, a weakened immune system can make it difficult for the body to control bacterial populations in the small intestine, increasing the risk of SIBO developing or worsening.

Chronic conditions like irritable bowel syndrome (IBS), celiac disease, and Crohn’s disease are often associated with an increased risk of developing SIBO. These conditions can cause inflammation and other changes in the digestive tract that make it easier for bacteria to overgrow.

Diagnosing SIBO: How Is It Identified?

Since symptoms of SIBO, including bloating and gas, often overlap with those of other digestive disorders, diagnosing it can be a challenge. However, there are specific tests that can help. One of the most common diagnostic tools is the breath test. This non-invasive test measures the levels of hydrogen and methane in a person’s breath. These gases are produced by the bacteria in the small intestine and can be detected after the patient consumes a sugar solution. Elevated levels of these gases often suggest bacterial overgrowth.

In some cases, a more direct approach may be taken, such as sampling the fluid from the small intestine to check for bacterial overgrowth. However, this method is more invasive and less commonly used. It’s important for anyone experiencing symptoms suggestive of SIBO to consult with a healthcare provider, who can determine the most appropriate diagnostic approach.

Treatment: Managing and Overcoming SIBO Naturally

A naturopathic approach to treating SIBO focuses on addressing its root causes, supporting the body’s natural healing processes, and promoting overall digestive health. This holistic approach includes dietary changes, such as following a low FODMAP diet or elemental diet, to reduce the bacteria’s food supply and cut down on bacterial overgrowths. FODMAPs (Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols) are short-chain carbohydrates loved by bacteria because they are poorly absorbed in the small intestine, and provide an easy fermentable meal that allows the bacteria to flourish. By reducing the intake of high-FODMAP foods, such as wheat, certain fruits, vegetables, and dairy products, people with SIBO can decrease the availability of food for the bacteria, leading to a reduction in symptoms like bloating, gas, and diarrhea.

Herbal antimicrobials, like oregano oil and berberine, are commonly used instead of traditional antibiotics to reduce bacterial overgrowth while maintaining a healthy gut balance.

In addition to these treatments, naturopathic doctors emphasize the importance of supporting digestion with supplements like digestive enzymes and probiotics, managing stress through lifestyle changes, and addressing underlying conditions that contribute to SIBO. Long-term strategies often involve detoxification and gut healing protocols to restore the integrity of the digestive system and prevent recurrence. By taking this comprehensive and individualized approach, naturopathic treatment aims to not only relieve symptoms but also promote lasting digestive health.

Living with SIBO: Long-Term Considerations

For many people, SIBO can be a chronic condition that requires ongoing management. Recurrence is common, particularly if the underlying causes of the bacterial overgrowth are not addressed. This means that long-term dietary management, regular monitoring, and sometimes repeated courses of treatment may be necessary.

While SIBO can be a challenging condition to live with, it is manageable with the right approaches. Education and awareness are key components of living well with SIBO. Understanding the condition, recognizing the symptoms, and knowing when to seek medical advice can make a significant difference in managing the condition effectively. Additionally, working closely with our naturopathic doctors to develop a comprehensive treatment and management plan can help those living with SIBO lead healthier, more comfortable lives. Book with us today to get your assessment and start reversing your gut discomfort!

Herbal antimicrobials, like oregano oil and berberine, are commonly used instead of traditional antibiotics to reduce bacterial overgrowth while maintaining a healthy gut balance.