
Small Intestine Bacterial Overgrowth (SIBO) is a bacterial infection of the small intestine that can cause symptoms such as bloating, gas, diarrhoea, and abdominal pain. A SIBO diet typically involves reducing the intake of fermentable foods, including certain vegetables, fruits, and carbohydrates, and increasing the consumption of lean proteins and healthy fats. Olive oil is considered a healthy fat and is allowed in the SIBO diet, along with other oils such as coconut oil, avocado oil, and nuts. However, it is important to note that extra virgin olive oil should not be heated as it may lose its health benefits. The SIBO diet is typically recommended for a maximum of four to eight weeks, and the specific duration depends on the individual's symptoms and response to the diet.
| Characteristics | Values |
|---|---|
| SIBO Diet | A low-FODMAP diet that reduces intake of fermentable foods |
| Olive Oil | Allowed as a source of healthy fats |
| Other Allowed Fats | Coconut oil, ghee, avocado oil, lard, hard cheese, nuts, and seeds |
| Prep Diet | Plain white rice, eggs, clear meat broth, fats/oils, salt, and pepper |
| Beverages | Weak black coffee, weak black tea, water, and Lactaid milk |
| Duration | Recommended for 4 to 8 weeks, depending on symptom improvement |
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What You'll Learn

Olive oil is allowed on a SIBO diet
SIBO, or Small Intestine Bacterial Overgrowth, is addressed with a specific diet that aims to reduce symptoms and assist treatment. This diet typically involves reducing the intake of fermentable foods, which is where a low FODMAP diet is often recommended. However, it's important to note that dietary strategies are personalised and depend on the severity of symptoms, normal dietary habits, and previous treatments.
Olive oil is permitted as part of the SIBO diet because it is a type of fat that can be included in moderation. Other allowed fats include coconut oil, ghee, lard, and certain cheeses. While olive oil is acceptable, it's important to be mindful of how it is used. For example, extra virgin olive oil infused with garlic can be a tasty addition, but heating it may reduce its health benefits.
In the context of a SIBO breath test, the diet is more restricted. The goal is to starve the bacteria for a day to ensure accurate test results. In this case, olive oil is allowed, but only in its pure form, and it should not be combined with other ingredients. It is important to consult a doctor or dietitian for specific guidance on the SIBO diet, as modifications may be necessary based on individual needs.
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The SIBO diet involves a 24-48 hour prep
The SIBO (Small Intestinal Bacterial Overgrowth) breath test involves a 24-48 hour prep diet, a 12-hour fast, and then a 3-hour breath test. The length of the prep diet depends on a doctor's recommendation. The goal of the prep diet is to starve the bacteria to produce the best results when doing the test.
During the prep diet, you should stop taking all non-essential medications, supplements, and probiotics. This includes over-the-counter pain medications, allergy medications, and antacids. If you are unsure what medication is considered essential, consult your doctor. You should also avoid tobacco and cannabis products during this time.
The SIBO prep diet is restrictive and cuts out plant products and sugars. The only grain acceptable on the prep diet is plain, white rice. Other grains have a higher level of fibre and macromolecules that SIBO bacteria like to eat. If you do not normally eat rice, do not eat any during the prep diet.
The only foods you can eat during the prep diet are:
- Lean meats or proteins
- High glycemic index carbohydrates
- Fats/oils (coconut/olive/avocado oil, butter, or lard)
- Salt and pepper (no other herbs/spices)
- Weak black coffee and/or weak black tea (plain, no sweeteners or cream)
- Plain water (no mineral water or water with additives)
It is important to note that the SIBO diet is not meant to be a long-term diet and is usually recommended for four to eight weeks maximum. The diet is meant to reduce the intake of fermentable foods, and the way it is implemented will depend on the individual's current symptom severity and quality of life.
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The diet cuts out plant products and sugars
The SIBO diet is typically recommended for four to eight weeks, and it involves cutting out plant products and sugars. This is because SIBO, or small intestinal bacterial overgrowth, is caused by bacteria that feed on plant products and sugars. By starving the bacteria of these food sources, the diet aims to reduce symptoms and assist in the treatment of SIBO.
The SIBO diet is not overly restrictive, and it is meant to be tailored to individual needs and preferences. It is moderate in fiber, low in fat, and restricts some raw vegetables and certain carbohydrates. While the diet cuts out plant products and sugars, it does allow for some healthy fats, such as olive oil, coconut oil, ghee, avocado oil, lard, and certain cheeses.
The allowed meats include any meat, poultry, fish, or seafood that is not cured or brined. In addition, plain, steamed white rice is permitted as it has a lower fiber content compared to other grains. Eggs are also a nutritious option on the SIBO diet. Clear meat broth, made without bones or vegetables, is another recommended food item.
For beverages, the diet suggests weak black coffee or tea without any sweeteners or cream. Plain water is also allowed, but mineral water or water with additives should be avoided. It is important to note that the SIBO diet is not a treatment in itself, and it should be combined with traditional treatment methods. Before making any dietary changes, it is recommended to consult a doctor or dietitian.
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The diet is moderate in fibre, low fat and restricts some raw vegetables
The SIBO diet is recommended for four to eight weeks, depending on the individual's symptoms and improvement. It is a therapeutic diet that aims to reduce the intake of fermentable foods and starve the bacteria in the small intestine. The diet is moderate in fibre, low in fat, and restricts some raw vegetables, carbohydrates, and sugars.
The SIBO diet allows for fats such as olive oil, avocado oil, coconut oil, ghee, lard, and hard cheeses. It is important to note that the diet restricts plant-based fats and encourages animal-based fats. This is because SIBO bacteria thrive on plant products and sugars. However, olive oil is allowed and can be used in salad dressings or infused with garlic for added flavour.
When it comes to vegetables, the SIBO diet restricts raw vegetables, especially those high in fermentable fibres. This includes onions, broccoli, leeks, asparagus, garlic, cabbage, artichokes, okra, and sugar snap peas. However, some vegetables that grow underground, such as potatoes, yams, beets, carrots, and turnips, are allowed. Vegetables that grow on plants, like peppers, tomatoes, cucumbers, zucchini, squash, and eggplants, are also permitted. Mushrooms and ginger are encouraged.
The SIBO diet is also low in certain carbohydrates, as some carbs and sugar substitutes can feed the bacteria. It is recommended to avoid lactose, fructose concentrate, Splenda (sucralose), mannitol sorbitol (found in sugar-free products), oligosaccharides (found in soy milk), and corn syrup. Allowed sugars include glucose, sucrose, aspartame (Nutra Sweet), and saccharin.
It is important to note that the SIBO diet is not a permanent solution, and other lifestyle factors, such as exercise and relaxation, are equally important in managing SIBO. Additionally, a personalised supplement programme, including probiotics, may be recommended by a healthcare professional.
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The diet is recommended for four to eight weeks maximum
The SIBO diet is recommended for a maximum of four to eight weeks. This is because it can be restrictive and involve cutting out some healthy foods. The diet aims to reduce symptoms and assist treatment, and it can be continued for longer periods if symptoms do not improve.
The diet is typically implemented after SIBO has been confirmed by a breath test. It is important to note that diet alone is often not enough to treat SIBO, and other lifestyle factors such as exercise and relaxation are equally important. The diet should be tailored to the individual's current symptom severity and quality of life. For example, there is evidence to suggest that probiotics can decontaminate the small intestine, so these can be considered before or alongside the diet.
The SIBO diet involves reducing the intake of fermentable foods, which is where the low FODMAP diet comes in. This includes reducing or avoiding vegetables such as onions, broccoli, leeks, asparagus, garlic, and cabbage. It is important to note that the foods to be avoided or limited are very individual-specific, and a general reduction in fermentable foods is usually needed to establish which specific foods are triggers.
The diet is moderate in fibre, low in fat, and restricts certain carbohydrates and sugars that feed the bacteria causing SIBO. Healthy fats such as olive oil, avocado oil, nuts, and seeds are allowed. Herbs and spices are generally not allowed, but mustard is an exception, and it can be added to extra virgin olive oil and lemon to make a salad dressing.
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Frequently asked questions
Yes, olive oil is ok for a SIBO diet. It is considered a healthful fat and can be used in cooking, although it should not be heated to a high temperature as this reduces its health benefits.
The SIBO diet is a way of managing Small Intestine Bacterial Overgrowth. It involves reducing the intake of fermentable foods, particularly plant products and sugars, which feed the bacteria.
The SIBO diet is moderate in fibre, low in fat, and restricts certain carbohydrates and sugars. Recommended foods include meat, poultry, eggs, fish, and seafood, as well as vegetables that grow under the ground, such as potatoes, carrots, and beets.
Foods that should be avoided include high-fibre foods, dairy, and foods containing certain sugars and carbohydrates, such as lactose, fructose, and corn syrup.











































