SIBO Food Checker

Peanut butter contains fructooligosaccharides (FOS) and galacto-oligosaccharides (GOS) that are highly fermentable by gut bacteria. Larger portions frequently trigger bloating and gas, especially in hydrogen-dominant SIBO. Small amounts (1 tablespoon) are tolerated by some people.

Standard yogurt (fermented 6-8 hours) retains significant lactose, which feeds SIBO bacteria. However, 24-hour fermented yogurt reduces lactose to near-zero levels and may actually help by introducing beneficial bacteria. Lactose-free yogurt is another option.

White potatoes are low in FODMAPs and generally well-tolerated during SIBO. They are a good source of easily digestible starch and potassium. Boiled, baked, or mashed (without garlic or high-FODMAP toppings) are the safest preparations.

Alcohol damages the intestinal lining, disrupts gut motility (the underlying cause of SIBO), and feeds bacterial overgrowth. Beer is the worst choice due to wheat, yeast, and carbonation. Sweet cocktails and wine contain fermentable sugars. Alcohol also interferes with antimicrobial treatment effectiveness.

Many protein powders contain inulin, chicory root fiber, sugar alcohols (sucralose, erythritol), or whey concentrate — all of which can trigger SIBO symptoms. However, some types are well-tolerated. Whey protein isolate (not concentrate), collagen peptides, and egg white protein are generally the safest options.

Most teas are safe and even beneficial for SIBO. Peppermint tea relaxes intestinal smooth muscle and reduces bloating. Ginger tea supports motility and reduces nausea. Green tea and black tea (weak brew) are well-tolerated. Chamomile tea has anti-inflammatory properties for the gut.

Garlic contains the highest concentration of fructans of any commonly eaten food. Even small amounts — including garlic powder, garlic salt, and garlic-infused sauces — can trigger severe bloating, gas, and pain in people with SIBO. Fructans are one of the most fermentable FODMAP groups.

Onions are extremely high in fructans and are one of the top two trigger foods for SIBO (along with garlic). All types — white, red, yellow, shallots, spring onion bulbs — contain high levels of fermentable oligosaccharides. Even small amounts cooked into sauces or soups can trigger symptoms.

White rice is one of the safest grains for SIBO. It is low in FODMAPs, easy to digest, and unlikely to feed bacterial overgrowth. It serves as a reliable staple carbohydrate during SIBO treatment and is well-tolerated by most people regardless of SIBO type.

Eggs are one of the safest and most nutritious foods during SIBO treatment. They contain zero FODMAPs, are easily digestible, and provide high-quality protein, B vitamins, and choline. Scrambled, boiled, poached, or fried in olive oil are all safe preparations.

Plain chicken is completely FODMAP-free and one of the best protein sources during SIBO. It provides lean protein without any fermentable carbohydrates. Grilled, baked, roasted, or sautéed in olive oil are all safe cooking methods.

Beans, lentils, and legumes are extremely high in galacto-oligosaccharides (GOS), one of the most fermentable FODMAP groups. They are a primary fuel source for the bacteria causing SIBO and reliably trigger severe bloating, gas, and pain. This includes kidney beans, black beans, chickpeas, lentils, and soybeans.

Wheat contains fructans, a fermentable oligosaccharide that feeds SIBO bacteria. This includes white bread, whole wheat bread, pasta, crackers, and most baked goods. The fructan content is the issue, not gluten — so gluten-free bread made from safe flours may be tolerated.

Hard, aged cheeses (cheddar, Parmesan, Swiss, Gruyère) are low in lactose due to the aging process and are generally safe for SIBO. Soft cheeses (ricotta, cottage cheese, cream cheese, brie) retain more lactose and are higher risk. The longer a cheese is aged, the less lactose it contains.

Regular cow's milk contains significant lactose, a disaccharide that is poorly absorbed when the small intestine is damaged by SIBO. Unabsorbed lactose feeds the bacterial overgrowth and causes bloating, gas, diarrhea, and cramping. This applies to whole, skim, and low-fat milk equally.

Black coffee itself is low in FODMAPs and can actually benefit methane-dominant SIBO by stimulating gut motility. However, coffee increases stomach acid production and gut motility, which can worsen diarrhea in hydrogen-dominant SIBO. The main risk comes from additives — regular milk, cream, sugar, and flavored syrups.

Dark chocolate (70% cocoa or higher) in small amounts is low in FODMAPs and generally tolerated. Milk chocolate is higher risk due to lactose content. White chocolate should be avoided (high in milk solids and sugar). The issue is usually the added ingredients — sugar, milk, inulin fiber, and sugar alcohols — rather than the cocoa itself.

Oats are moderate in FODMAPs. Small portions (1/4 cup dry) are low-FODMAP and generally tolerated, but larger portions (1/2 cup or more) become high-FODMAP and can trigger symptoms. Oats also contain beta-glucan fiber which some SIBO patients find difficult to digest.

Avocado is a dose-dependent FODMAP food. Small amounts (1/8 of an avocado) are low in sorbitol and generally safe. Larger portions (1/4 avocado or more) become high in sorbitol, a polyol that is fermentable by gut bacteria. Most people with SIBO can tolerate the smaller portion without symptoms.

Honey is extremely high in excess fructose — it contains more fructose than glucose, making it a high-FODMAP food. Excess fructose is poorly absorbed in the small intestine even in healthy people, and in SIBO patients it becomes a direct fuel source for the bacterial overgrowth, causing rapid bloating and gas.

Firm, unripe bananas are low in FODMAPs and safe for most SIBO patients. They provide potassium, vitamin B6, and easily digestible carbohydrates. As bananas ripen and develop brown spots, their fructan content increases and they may become problematic.

Blueberries are low in FODMAPs and safe for SIBO. They provide antioxidants, vitamin C, and fiber without feeding bacterial overgrowth. They are one of the best fruit options during SIBO treatment.

Strawberries are low in FODMAPs and well-tolerated during SIBO. They provide vitamin C and antioxidants. They are one of the safest fruits for SIBO patients and can be eaten as snacks, in smoothies, or as dessert.

Apples are high in excess fructose and sorbitol — two FODMAP categories that are highly fermentable. They are one of the most common fruit triggers for SIBO patients. Apple juice and apple cider are equally problematic. Even cooked apples retain their high fructose content.

Spinach is low in FODMAPs and one of the safest vegetables for SIBO. It is nutrient-dense, providing iron, folate, magnesium, and vitamins A and K — nutrients that SIBO patients are often deficient in. Raw or cooked, spinach is well-tolerated.

Carrots are low in FODMAPs and well-tolerated during SIBO. They provide beta-carotene, vitamin K, and fiber. Raw, steamed, roasted, or added to soups — all preparations are safe. Carrots are a staple vegetable in most SIBO elimination diets.

Broccoli florets (the heads) are low in FODMAPs in moderate portions and can be tolerated by many SIBO patients. However, broccoli stalks are higher in FODMAPs and should be avoided. Large portions of even the florets can trigger gas and bloating due to their sulfur-containing compounds.

Cauliflower is high in mannitol, a sugar alcohol that is highly fermentable and poorly absorbed. It is one of the most common vegetable triggers for SIBO bloating and gas. Cauliflower rice, cauliflower pizza crust, and other cauliflower-based substitutes are equally problematic.

Zucchini is low in FODMAPs and one of the most versatile safe vegetables for SIBO. It can be spiralized as a pasta substitute, sliced into salads, grilled, sautéed, or added to soups. It provides vitamin C, potassium, and is easy to digest.

Bell peppers (red, green, yellow, orange) are low in FODMAPs and safe for SIBO. They provide vitamin C, vitamin A, and antioxidants. They add flavor and crunch to meals without triggering symptoms.

Fresh tomatoes are low in FODMAPs and safe for SIBO in common portion sizes. They provide lycopene, vitamin C, and potassium. Canned tomatoes and tomato paste are also low-FODMAP and safe for cooking sauces.

Most mushroom varieties are high in mannitol, a polyol (sugar alcohol) that is poorly absorbed and highly fermentable. Button, cremini, portobello, shiitake, and enoki mushrooms are all high-FODMAP. They are a frequent trigger for bloating and gas in SIBO patients.

Cucumbers are low in FODMAPs and very well-tolerated during SIBO. They are hydrating, low-calorie, and provide a refreshing crunch to meals. They are one of the safest raw vegetables for SIBO patients.

Salmon is FODMAP-free and one of the best protein sources during SIBO. It provides omega-3 fatty acids which help reduce intestinal inflammation — a key benefit since SIBO causes chronic gut inflammation. Wild-caught salmon is preferred for higher omega-3 content.

Firm and extra-firm tofu are low in FODMAPs because the processing removes most of the fermentable galacto-oligosaccharides (GOS) found in soybeans. This makes tofu one of the best plant-based protein sources for SIBO patients, unlike whole soybeans or edamame which should be avoided.

Quinoa is low in FODMAPs and a nutritious grain alternative for SIBO patients. It provides complete plant protein, iron, magnesium, and B vitamins — nutrients commonly depleted by SIBO. It is gluten-free and well-tolerated by most people.

Watermelon is high in excess fructose and mannitol — two FODMAP categories. It is one of the highest-FODMAP fruits and a common trigger for severe bloating and gas in SIBO patients. Even small portions contain enough fermentable sugars to cause symptoms.

Oranges are low in FODMAPs and safe for SIBO. They provide vitamin C, which supports immune function often compromised by SIBO. The fructose-to-glucose ratio in oranges is balanced, making them well-absorbed.

Grapes are low in FODMAPs and safe for SIBO. They provide natural sweetness, hydration, and antioxidants (especially red and purple varieties). They make an excellent snack or dessert option during SIBO treatment.

Mango is high in excess fructose, making it a high-FODMAP fruit that feeds SIBO bacteria. It is one of the sweeter tropical fruits and frequently triggers bloating and gas. Dried mango is even worse due to concentrated sugars.

Corn is moderate in FODMAPs — small portions are generally tolerated but larger amounts contain enough sorbitol to trigger symptoms. Corn is also difficult to digest due to its cellulose outer shell, which can worsen symptoms in people with compromised gut lining from SIBO.

Sweet potatoes are moderate in FODMAPs. Small portions (1/2 cup) are low-FODMAP and tolerated by most SIBO patients, but larger portions contain enough mannitol to trigger bloating and gas. They are more restrictive than regular white potatoes.

Celery is moderate in mannitol — a sugar alcohol that is fermentable. Small amounts are tolerated but larger portions (more than 1/4 stalk) can trigger symptoms. Celery juice, which concentrates the compounds, is particularly problematic for SIBO patients despite its wellness trend popularity.

Cabbage contains moderate levels of FODMAPs (fructans and mannitol) and is a gas-producing cruciferous vegetable. Small portions of common green cabbage may be tolerated, but larger portions and red/savoy cabbage varieties are more problematic. Sauerkraut (fermented cabbage) is better tolerated and may even benefit gut health.

Asparagus is high in fructans and excess fructose, making it a high-FODMAP vegetable that should be avoided during active SIBO. Both green and white asparagus are problematic. Asparagus is a common trigger for bloating and gas.

Green beans are low in FODMAPs and safe for SIBO. Despite being technically a legume, green beans contain far less GOS than mature beans and lentils. They provide fiber, vitamin K, and vitamin C while being easy to digest.

Ginger is not only safe for SIBO — it is actively beneficial. Ginger is a natural prokinetic that supports the migrating motor complex (MMC), helping to prevent SIBO recurrence. It also reduces nausea, calms intestinal inflammation, and supports digestion. Fresh ginger, ginger tea, ginger capsules, and ground ginger are all safe.

Coconut products vary in FODMAP content. Coconut oil is FODMAP-free and safe. Coconut cream and canned coconut milk are low-FODMAP in moderate portions. Shredded/desiccated coconut is moderate. Coconut water is high in FODMAPs and should be avoided. Coconut flour is high-FODMAP.

Bone broth is low in FODMAPs (when made without onion and garlic) and provides amino acids like glycine, proline, and glutamine that support intestinal lining repair. The gelatin and collagen in bone broth help heal the damaged gut barrier caused by SIBO. It is one of the most recommended healing foods during SIBO treatment.

Kiwi is low in FODMAPs and safe for SIBO. It is rich in vitamin C and contains actinidin, a natural enzyme that aids protein digestion. Green kiwi also has a mild natural laxative effect that can help methane-dominant SIBO patients who struggle with constipation.

Pears are very high in excess fructose and sorbitol — two of the most fermentable FODMAP categories. They are one of the worst fruits for SIBO, often causing rapid-onset bloating and gas. Pear juice is equally problematic.

Regular wheat pasta is high in fructans and should be avoided during SIBO. However, gluten-free pasta made from rice, corn, or quinoa is low in FODMAPs and well-tolerated. The issue is the wheat, not the pasta format itself.

Table sugar (sucrose) is technically low-FODMAP because it contains equal parts glucose and fructose, which are absorbed together. Small amounts are tolerated. However, sugar feeds bacteria in general, so minimizing intake during SIBO treatment is recommended even though it is not a FODMAP issue.

Bok choy is low in FODMAPs and one of the safest cruciferous vegetables for SIBO. Unlike broccoli, cauliflower, and cabbage, bok choy is well-tolerated and provides calcium, vitamin K, and vitamin C. It is an excellent choice for stir-fries and Asian-inspired SIBO-safe meals.

Pure maple syrup is low in FODMAPs and the best sweetener option for SIBO patients. It contains primarily sucrose (balanced glucose-fructose), which is well-absorbed. It provides small amounts of minerals like manganese and zinc.