What is SIBO?

Small Intestinal Bacterial Overgrowth (SIBO) is a condition characterized by an overgrowth of bacteria in the small intestine, which can lead to various digestive symptoms.

While functional medicine recognizes the importance of individualized care, and it’s essential to work with a healthcare professional for personalized advice, here are some general dietary recommendations that are often considered in the functional medicine approach to treating SIBO:

1. Low-FODMAP Diet: Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols (FODMAPs) are types of carbohydrates that can exacerbate SIBO symptoms. A low-FODMAP diet restricts the intake of certain carbohydrates to reduce bacterial fermentation in the small intestine. Foods to limit or avoid include garlic, onions, certain fruits, and some dairy products.
2. Restrict Fermentable Carbohydrates: In addition to FODMAPs, limiting other fermentable carbohydrates can be beneficial. This includes reducing the intake of sugars, refined carbohydrates, and high-starch foods.
3. Protein and Fat Intake: Emphasize sources of protein and healthy fats, as these macronutrients are less likely to ferment in the small intestine. Good protein sources include lean meats, fish, eggs, and plant-based proteins. Healthy fats can be found in avocados, olive oil, and nuts.
4. Limit Dairy: Many individuals with SIBO may have difficulty digesting lactose, the sugar found in dairy products. Limiting or avoiding dairy may be helpful in alleviating symptoms.
5. Probiotics: While the use of probiotics is a topic of ongoing research, some functional medicine practitioners may recommend specific probiotic strains to help rebalance the gut microbiota. However, this is a complex area, and it’s crucial to consult with a healthcare professional for personalized guidance.
6. Herbal Therapy: Certain herbs may have antimicrobial properties and can be used in the treatment of SIBO. Examples include oregano oil, berberine, and neem. However, their use should be supervised by a healthcare provider.
7. Meal Timing and Frequency: Some individuals with SIBO find relief by spacing out their meals and practicing intermittent fasting. This can give the digestive system more time to rest and reduce the bacterial load in the small intestine.

It’s important to note that dietary approaches can vary based on the specific type of SIBO (hydrogen-dominant, methane-dominant, or a combination) and individual tolerances. Additionally, working with a healthcare professional, such as a functional medicine practitioner or registered dietitian, is crucial to tailor the approach to your specific needs and monitor progress. Dietary changes should be made under the guidance of a qualified healthcare provider to ensure nutritional adequacy and prevent potential complications.

In a diet designed to manage Small Intestinal Bacterial Overgrowth (SIBO), certain fruits high in fermentable sugars and fibers, known as FODMAPs, are typically restricted. FODMAP stands for Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols. These compounds can be fermented by bacteria in the gut, leading to symptoms in individuals with SIBO. Here are some fruits that are high in FODMAPs and are often advised to be limited or avoided:

1. Apples: Apples are high in fructose and polyols (sorbitol and mannitol).
2. Pears: Similar to apples, pears contain high levels of fructose and polyols.
3. Watermelon: Watermelon is rich in fructose and should be limited.
4. Mangoes: Mangoes are high in fructose.
5. Cherries: Cherries contain both fructose and polyols.
6. Plums: Plums are high in sorbitol.
7. Peaches: Peaches are high in both fructose and polyols.
8. Nectarines: Nectarines contain fructose and polyols.
9. Apricots: Apricots are high in sorbitol.
10. Grapes: Grapes contain both fructose and polyols.

It’s important to note that individual tolerance to these fruits can vary. Some people with SIBO may be able to tolerate small amounts of certain fruits, while others may need to avoid them altogether. Additionally, the severity and type of SIBO (hydrogen-dominant, methane-dominant, or a combination) can influence dietary recommendations.

When following a low-FODMAP diet for SIBO, it’s advisable to work with a healthcare professional or a registered dietitian experienced in managing gastrointestinal conditions. They can help create a personalized and sustainable dietary plan, ensuring that nutritional needs are met while minimizing symptoms associated with SIBO.