Recurrent SIBO: Why It Comes Back, Main Causes, and How to Truly Prevent It

Small intestinal bacterial overgrowth, known as SIBO , is a condition that can cause persistent digestive discomfort, such as bloating, gas, abdominal pain, and changes in bowel rhythm. The major challenge for those facing SIBO is that, even after treatment, the condition can return. Understanding the reasons for recurrence and adopting prevention strategies is essential to avoid relapses and ensure a better quality of life.

SIBO occurs when there is an abnormal increase in the number of bacteria in the small intestine, a place where the number of microorganisms should normally be low. After treatment, mainly with antibiotics, many patients experience improvement in symptoms, but recurrence is common. Studies show that up to 65% of cases can recur, especially if the underlying causes are not adequately treated.

Factors that favor the return of SIBO include changes in intestinal motility (bowel movements), frequent use of antibiotics, anatomical disorders, chronic diseases such as diabetes, hypothyroidism, as well as inadequate eating habits and chronic stress.

SIBO recurrence is often linked to unresolved causes, such as:

• Disorders in intestinal motility (e.g., irritable bowel syndrome);

• Prolonged use of medications;

• Anatomical changes (e.g., post-surgical adhesions);

• Chronic diseases (e.g. hypothyroidism);

• Chronic stress and compromised immunity;

• Poor diet and sedentary lifestyle.

If only the symptoms are treated, without investigating and correcting these factors, the risk of recurrence increases considerably.

Discovering and treating the root cause of SIBO is the most important step in preventing its recurrence. This can involve everything from medication adjustments, treatment of underlying conditions, and lifestyle changes. A thorough medical evaluation, including tests and a patient history review, is essential to identify the underlying cause of the bacterial imbalance.

For example, if the cause is a bowel motility disorder, prokinetic medications may be necessary, which help the bowel function better. If there are anatomical changes, a surgical approach or specific monitoring may be indicated.

In addition to medical treatment, some strategies can help prevent new SIBO attacks:

• Proper nutrition: Diets such as Low-FODMAP or low-fermentation diets can help control symptoms and reduce bacterial fermentation, but should be followed under professional supervision and for a limited time.

• Spacing meals: Avoiding constant eating allows the intestine to perform the so-called "migratory motor complex," a natural cleansing process that reduces bacterial buildup. Therefore, spacing meals and avoiding snacks outside of mealtimes are recommended.

• Intermittent fasting: For some people, controlled periods of fasting can benefit intestinal motility and help prevent relapses, but this strategy should be individualized and monitored by a healthcare professional.

• Probiotics and prebiotics: The use of specific probiotics can help rebalance the intestinal flora, but the choice of type and dose should be guided by a specialist.