What is SIBO?
Causes of SIBO
SIBO typically begins when you don’t move food properly through your small intestine. A large number of bacteria grow and stay around too long. An imbalance can develop if the “good” bacteria that help you digest food cannot keep up with the “bad” germs. In addition to diarrhea, excessive bacteria may lead to malnutrition and weight loss.
A diagnosis could be made using a medical examination and a laboratory investigation of pus or discharge.
Underlying Conditions
Dietary Factors
- High sugar intake
- Refined carbohydrates
- Processed foods
SIBO Symptoms
Hydrogen dominant SIBO is most associated with diarrhea, while methane prevalent is linked to constipation.
Hydrogen Sulfide (H2S) is a third form of gas commonly present among patients with SIBO. This type cannot be detected with a breath test. However, it is diagnosed by the presence of sulfur-like, rotten egg-smelling gas or belching.
Here are six of the most notable symptoms caused by these gases, usually hydrogen and methane:
- Bloating – feeling full and uncomfortable, especially 1-2 hours after eating carbohydrate-rich meals (sugars are a type of carbohydrate).
- Abdominal pain – associated with bloating. Abdominal pain can be caused by gases building up in the small intestine, stretching the intestinal walls. People may be unable to perform daily tasks due to this pain, which can be crippling.
- Excessive belching – When gas builds up in the small intestine, it must be expelled! Although belching is normal after eating and drinking, especially fizzy beverages, SIBO can cause excessive belching that can be embarrassing and uncomfortable.
- Reflux – Long-term use of proton pump inhibitors for reflux symptoms is believed to be one of the causes of SIBO. Bacteria enter the small intestine through the stomach when these medications make it less acidic. Belching can cause patients to belch acid out of the stomach into their gullet, mimicking reflux symptoms like heartburn.
- Flatulence/wind – Wind can be very smelly when patients suffer from SIBO. SIBO patients may experience difficulties going out, leading to relationship problems.
- Constipation or diarrhea – commonly seen as symptoms of irritable bowel syndrome (IBS), both can be symptoms of SIBO. It is less clear what causes this symptom than the others, but many practitioners believe that at least some people with IBS may also have SIBO.
Diagnosing SIBO
Testing Methods
Interpreting Results
Treatment Options for SIBO
Low-FODMAP foods are included in the diet for a temporary period to decrease bacterial overgrowth in SIBO patients. It usually lasts 2 to 6 weeks.

Which foods should you avoid?
A gradual elimination diet is required to treat SIBO. The goal is to reduce inflammation throughout the digestive tract and minimize bacterial overgrowth in your small intestine.
By eliminating sugar alone, you may be able to improve your symptoms. People with digestive disorders often adhere to low-FODMAP diets, which include carbs that are hard to digest and ferment.
When eliminating FODMAPs from your SIBO diet, focus on the following main categories:
- Fructose, simple sugars commonly found in fruits and some vegetables, honey, and agave nectar
- Lactose, a sugar molecule in dairy products
- Fructans, a sugar compound found in gluten products, fruits, some vegetables (wheat, garlic, onion, asparagus, leeks, artichokes, broccoli, cabbage), and prebiotics
- Galactans, a compound found in some legumes, cabbage, brussels sprouts, soy
- Polyols, a sugar alcohol often used as a sweetener (sorbitol, isomalt, lactitol, maltitol, xylitol, and erythritol, commonly found in sugar-free gum, mints, and some medications)
Which SIBO diet is best for you?
- LOW FODMAP DIET– This diet limits a particular group of carbs known as FODMAPs, short for Fermentable Oligosaccharides (fructans and oligosaccharides), Disaccharides (lactose), Monosaccharides (fructose), and Polyols (sorbitol and mannitol). It is possible to suffer from gas and bloating from these foods because some carbohydrates are resistant to digestion. Symptoms such as loose stools, diarrhea, and abdominal cramping are caused by the osmotic effect of carbohydrates in some foods.
- SPECIFIC CARBOHYDRATE DIET (SCD)—is a restrictive, grain-free diet plan designed to help people with conditions such as Crohn’s disease, ulcerative colitis, celiac disease, diverticulitis, cystic fibrosis, and chronic diarrhea. It is thought that by eating just quickly digestible carbs, there will be no undigested carbohydrates to produce a chain reaction of intestinal discomfort.
- SIBO SPECIFIC FOOD PLAN—The SIBO Specific Food Plan was designed by leading SIBO expert Dr. Allison Siebecker, and is one of the few diets explicitly formulated for SIBO. SCD and low FODMAP diets are combined in this diet plan, which restricts a wide range of carbohydrates.
- BI-PHASIC DIET—The SIBO Bi-Phasic Diet designed by Dr. Nirala Jacobi, is a modified version of Dr. Siebecker’s SIBO Specific Food Plan. The protocol utilizes a 2-phase approach:
- Phase one (4 – 6 weeks) involves reducing trigger foods and repairing the gut lining and digestive system. This phase includes a very restrictive diet plan in addition to digestive support nutrients and probiotics.
- In phase two (4 – 6 weeks), the overgrowth will be removed as your gut naturally goes back into homeostasis. Despite being based on a low-fiber diet, this diet is slightly less restrictive. This phase also involves antimicrobial herbs and prokinetic supplements.
- ELEMENTAL DIET—The Elemental Diet has the highest restriction and is the only diet considered a primary treatment strategy for SIBO. The diet requires that medical food and beverages be consumed exclusively for two to three weeks. Nutrients are essential for survival when they are predigested and in their simplest form.
The Elemental Diet is beneficial in two ways: first, they can rest and heal because large food particles are not being broken down in the gut; second, the overgrowth of bacteria will cease because all carbohydrates are absorbed almost instantly, depriving it of its primary source of nourishment.
SIBO diets should be tailored to each individual based on their lifestyle, eating habits, motivation level, and history.
Supplements ideal for SIBO are:
How to treat SIBO Naturally?
Using low-FODMAP foods on the SIBO diet helps reduce bacterial growth. Usually, the treatment lasts between two and six weeks. Most importantly, getting your gut bacteria back in balance would be best, which should ease your symptoms and help your body absorb more nutrients from your food.
There is no one-size-fits-all approach—each patient must be treated uniquely based on their symptoms and lifestyle choices.
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- The first recommendation to overcome SIBO is to consume smaller food portions during meals. Spread your meals in 5–6 smaller amounts throughout the day rather than three larger meals. You can digest your food quicker when you eat smaller meals, which is crucial to overcoming SIBO. Overeating significantly contributes to SIBO, which causes food to sit in the stomach for a long time and reduces gastric juice production. SIBO is primarily driven by low stomach acid production since stomach acid kills bacteria in the upper GI tract.
- Starting probiotic supplements and eating probiotic-rich foods right away will help eliminate SIBO. The probiotic foods are as follows: Yogurt, Kefir, Sauerkraut, Tempeh, Kimchi, Miso, Kombucha, Pickles, Traditional buttermilk, Natto, and some types of cheese such as Gouda, mozzarella, cottage cheese, and cheddar.
- Essential oils are also helpful for people with SIBO symptoms and dietary changes and supplements. Several gastrointestinal symptoms, including IBS, were reported to be relieved by peppermint oil in a case report published in the Alternative Medicine Review. Essential oils such as oregano oil, tarragon oil, frankincense oil, clove oil, and others may also be beneficial when treating SIBO symptoms.
- Lifestyle changes include the SIBO diet and eating smaller meals 3 to 5 hours apart. It is also ideal to chew food thoroughly since digestion begins in the mouth. Drinking lots of water during the day keeps us hydrated.
- During the healing process, yoga, tai chi, barre, regular exercise, and acupuncture can reduce stress levels while keeping you motivated to stay on track with the SIBO diet.
- For patients who don’t respond well to Rifaximin, herbal remedies may be as effective as three courses of antibiotic treatment. Besides helping to eradicate bad gut bacteria, herbal antibiotics can provide many additional health benefits for your digestive system.
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Berberine
- Phellodendron (not to be confused with the household plant Philodendron)
- Coptis Chinensis
- Goldenseal
- Oregon grape root
- Barberry
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Polyphenols
- Pomegranate husk
- Propolis
- Cloves
- Oregano leaf
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Volatile oils
- Oregano oil
- Thyme oil
- Clove oil
- Peppermint oil
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- Add medium-chain triglycerides to your diet – Without using digestive enzymes, these fats are absorbed directly. Coconut oil is recommended for people with bacterial overgrowth or malabsorption.
There are many options available, and each person’s situation is unique. There is hope for those who suffer from this condition, and natural treatments can be very effective.