If you have tested positive for SIBO by taking a breath test, it’s important to understand what foods may aggravate your symptoms and what foods you can safely eat. The right diet can help you to manage unpleasant SIBO symptoms like bloating, abdominal pain, diarrhea and constipation [1, 2, 3, 4]. Diet is also an important part of a SIBO treatment plan.
Since SIBO is a bacterial overgrowth of the small intestine, dietary changes are meant to reduce bacterial populations in the digestive system. This is done by reducing the foods that feed gut bacteria.
While there are several options for a SIBO diet, it’s important to understand that the bacterial makeup of your digestive tract is unique. The goal of any SIBO diet is to figure out which foods trigger your symptoms and to develop a dietary approach that works for you.
Some SIBO patients believe they need to follow restrictive diet guidelines forever and live in fear of eating the wrong foods. This is a big mistake. Instead, use the guidelines for what to eat and not eat as a starting point only. Be strict about eliminating foods for the first 2-4 weeks and monitor your symptoms. Once your symptoms have improved, you can try some reintroductions.
Ultimately, you want to be able to eat as broad a diet as possible while still managing your symptoms.
When bacteria consume carbohydrate foods in your digestive tract, they produce gases as a byproduct. This process is known as fermentation.The best diets for SIBO are designed to feed you while starving your gut bacteria, thereby keeping fermentation levels low. This is done by lowering the fermentable carbohydrates in your diet.
There are three diets that research has shown to be helpful for gut conditions:
The GAPS diet and the Fast Tract diets follow similar principals, but there is no research yet to support their use.
Each of these diets is an elimination diet designed to remove fermentable foods that may trigger symptoms. The low FODMAP diet is the least restrictive of the diets. The most restrictive is the elemental diet, which replaces all normal foods with a liquid meal replacement.
While it’s possible to get detailed guides and apps for each of these diets, let’s start with a simple overview of the types of foods you should consider restricting with SIBO.
FODMAP is an acronym for these categories of foods: fermentable oligosaccharides, disaccharides, monosaccharides, and polyols. These categories are all high in fermentable carbohydrates and are those most likely to cause digestive symptoms.
Some examples of high FODMAP foods include:
For a complete FODMAP food list, read How To Use the Low FODMAP Diet to Improve IBS Symptoms.
Perhaps more important than what you can’t eat, is what you can eat. Note that portion sizes matter, and that a low FODMAP food can become a higher FODMAP food when eaten in large amounts. As always, monitor how you feel. Here is a list of low FODMAP foods that you should be able to eat freely:
It’s a good idea to eat fresh, whole foods with a SIBO diet, as this eliminates the many problematic ingredients found in processed foods.
Many conditions are caused by inflammation. Modern-day inflammatory conditions include:
Choose a few basic recipes and use them to develop a simple food list. Be willing to repeat meals a lot at first. Don’t be tempted to try fancy recipes right away. Once you are comfortable with your dietary changes and know which foods trigger your symptoms, explore new recipes and expand your menu options.
When the inflammation from the gut gets into the brain, it can alter your neurotransmitters or “happy mood” chemicals
This will help you to resolve symptoms quickly and give you a good baseline for food reintroductions.
If you don’t notice any benefit after a few weeks, consider a different approach.
The best food to reintroduce first is the one you missed the most. Pay attention to your symptoms for at least two days after the reintroduction. If a reintroduction goes well, you can follow with another after a few days. If your symptoms flare up as a result of a food reintroduction, wait until your symptoms are under control before you introduce an additional food.
The purpose of any elimination diet is to reduce symptoms and identify your trigger foods. Over time, you should be able to expand your diet while avoiding the foods that you know cause problems.
When it comes to treatment of SIBO, quick fixes don’t always work. Diet is an important part of an overall SIBO treatment plan and can help you manage SIBO symptoms.
A combination of treatments that address overall gut health is the best approach for long-term success. This may include probiotics , fasting periods , digestive supports , and herbal antimicrobials .
Probiotics can be very effective for treating SIBO, improving both symptoms and lab values [17, 18, 19, 20]. A low FODMAP diet combined with high-quality probiotics can reduce symptoms in a matter of weeks for many patients.
You have a unique intestinal microbiome and the best combination of SIBO treatments for you may not be the same for someone else. Learning what works for you is a process of personal experimentation.
If you have been struggling with digestive symptoms, getting them under control is a big win. Plus, by treating SIBO, you may experience beneficial effects on other health conditions.
Research shows a significant connection between SIBO and irritable bowel syndrome (IBS), with more than one-third of IBS patients testing positive for SIBO . Both conditions are the result of an unbalanced gut microbiome and benefit from similar treatment approaches.
Research also shows when SIBO treatments are successful, a number of non-digestive symptoms may also resolve. SIBO treatments have been shown to improve:
Research shows that SIBO is associated with other health conditions, including: hypothyroid , coronary artery disease , diabetes , chronic kidney disease , chronic pancreatitis , and Parkinson’s disease . We still need more research to identify if SIBO treatments can help to resolve these conditions.
Knowing what foods trigger your symptoms is a powerful tool for restoring your good health.
Don’t be reluctant to try an elimination diet. With a bit of planning and preparation, following a low FODMAP diet doesn’t need to be difficult. Keep in mind you only need to follow the strictest version of the diet for a few weeks before you can start reintroducing foods.
For help with treating SIBO, schedule an appointment at our center for functional medicine.
Learn how a functional medicine doctor can improve SIBO.Find Out More
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