Why SIBO Causes Fatigue and Tips for Finding Relief

What is SIBO and How Does it Develop?

SIBO, or small intestinal bacterial overgrowth, is a condition where abnormally large numbers of bacteria grow in the small intestine. The small intestine is supposed to have relatively low levels of bacteria compared to the large intestine.

When too much bacteria accumulates in the small intestine, it can cause a variety of digestive symptoms like bloating, diarrhea, abdominal pain, and nutritional deficiencies. SIBO may also cause systemic symptoms like fatigue, brain fog, and headaches.

Causes of SIBO

There are a few potential causes of SIBO:

• Impaired small intestinal motility - When the muscular contractions of the small intestine become dysfunctional, bacteria aren't cleared out properly which allows overgrowth.
• Anatomical abnormalities - Intestinal obstruction, diverticula, surgery, or scarring can change the anatomy of the small intestine in ways that promote bacterial stasis.
• Hypochlorhydria - Reduced stomach acid production allows more bacteria to survive and pass into the small intestine.
• Medications - Antibiotics, proton pump inhibitors, and immune suppressants can disrupt the small intestinal environment and encourage bacterial overgrowth.
• Diseases - Conditions like diabetes, scleroderma, and hypothyroidism are associated with higher rates of SIBO.

How Does SIBO Cause Fatigue?

Although the exact mechanisms are still being researched, there are some ways SIBO is thought to contribute to fatigue:

Inflammation

The presence of excess bacteria in the small intestine can trigger an immune response, causing inflammation both locally in the gut and systemically throughout the body. Chronic inflammation is taxing on the body and is linked to symptoms like fatigue and cognitive dysfunction.

Toxins

Bacteria produce waste products like hydrogen sulfide, D-lactic acid, ammonia, and ethanol that can be toxic in high amounts. These microbial toxins may get absorbed into the bloodstream, travel to the brain, and interfere with normal neurological function.

Nutrient Malabsorption

The overgrowth of bacteria can damage the lining of the small intestine and prevent proper absorption of nutrients like iron, vitamin B12, folate, and fat-soluble vitamins A, D, E, and K. Deficiencies in these nutrients can all contribute to fatigue.

Dysbiosis

SIBO causes dysbiosis or an imbalance in the gut microbiome which can have negative effects throughout the body. Healthy gut bacteria interact extensively with the brain and central nervous system through pathways like the gut-brain axis. Disrupting these pathways may impair energy regulation.

Other Factors That Can Exacerbate SIBO Fatigue

In addition to the direct effects of SIBO, there are some secondary factors that can worsen fatigue in people with SIBO:

Poor Sleep

The gastrointestinal symptoms of SIBO like abdominal pain and bloating can impair sleep quality. Poor sleep exacerbates fatigue and compromises immune function which may worsen SIBO.

Stress

Coping with a chronic illness can be extremely stressful. Stress raises cortisol and other inflammatory markers in the body which are linked to fatigue. Stress can also disrupt healthy eating and exercise habits which provide energy.

Dietary Restrictions

Eliminating foods like dairy, grains, and high FODMAP fruits and vegetables can help ease SIBO symptoms but may unintentionally reduce calorie and nutrient intake. Maintaining a well-balanced diet is important for sustaining energy.

Deconditioning

Fatigue and other SIBO symptoms may cause people to become less physically active. Reduced activity can lead to muscle deconditioning which further perpetuates feelings of weakness and exhaustion.

Tips for Relieving SIBO-Related Fatigue

Managing fatigue is an important aspect of treating SIBO. Here are some tips that may help:

Follow the Bi-Phasic Diet

This diet involves a more restrictive early phase to clear SIBO followed by a diversified reintroduction phase to support energy levels. Work with a nutritionist to ensure adequate calories and nutrients.

Take Digestive Enzymes

Digestive enzymes can help break down food particles and ease digestion. This takes stress off your body and may free up energy reserves.

Limit Simple Carbs

Avoid added sugar and refined grains which feed gut bacteria. Focus on complex carbs like vegetables, legumes, and sprouted grains which digest more slowly.

Stay Hydrated

Dehydration exacerbates fatigue. Drink adequate fluids, especially between meals to avoid diluting stomach acid needed to kill bacteria.

Reduce Stress

Make time for relaxing activities like light yoga, meditation, or nature walks. Get good sleep, organize yourschedule, and reach out for social support.

Take Probiotics

Probiotic supplements can help repopulate your gut with beneficial bacteria. Look for broad spectrum blends or yeast-targeting strains like Saccharomyces boulardii.

Consider Herbal Supplements

Herbs like peppermint, oregano oil, berberine, and monolaurin have natural antimicrobial effects. Always consult your doctor before trying.

Move Your Body

Light physical activity helps reduce inflammation, boosts energy, and prevents deconditioning. Start low and go slow.

When to Seek Medical Support

Make sure to consult your doctor if fatigue from SIBO becomes severe or persistent. They can check for underlying issues and provide guidance on additional testing or specialty referrals.

Seeking medical support is especially important if you experience:

• Profound or disabling fatigue
• Fevers, chills, or unexplained weight loss
• Chest pain or shortness of breath
• Signs of depression or suicidal thoughts

Testing for SIBO

If SIBO is suspected, your doctor may recommend a breath test which measures hydrogen and methane gas production after consuming lactulose or glucose. This provides a quantitative assessment of bacterial overgrowth.

SIBO Treatment

Treatment options your doctor may consider include:

• Antibiotics - Typically rifaximin, neomycin, or metronidazole
• Prokinetics - To improve small intestinal motility
• Elemental diet - Liquid nutrition formula to starve bacteria
• Herbal antimicrobials
• Diet changes
• Addressing underlying causes

Relief from fatigue often follows successful SIBO treatment, highlighting the strong link between the two conditions.

The Bottom Line

Fatigue is a common complaint for those suffering from SIBO. Research indicates several ways SIBO can directly and indirectly cause fatigue through mechanisms like inflammation, malnutrition, and dysbiosis. Managing SIBO requires a comprehensive approach including dietary changes, stress relief, gut-restorative supplements, physical activity, and medical treatment when appropriate. With patience and perseverance, many people find their energy levels improve as their SIBO resolves.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a healthcare professional before starting any new treatment regimen.