10 Best Foods for Gut Health

Yogurt, lentils, and oats are three of the 10 best foods for gut health because they provide live cultures or fiber that can support digestion. If you have digestive symptoms, the AI symptom analyzer may help you organize what to discuss with a clinician; it cannot diagnose a condition.

For complementary hydration ideas, see the best drinks for gut health.

What are the 10 best foods for gut health?

These foods offer a mix of fiber, plant compounds, and, in some cases, live microorganisms. They are practical choices rather than a scientifically proven ranking: no single food is known to create an ideal gut microbiome for everyone.

A 2024 review of diet and the gut microbiome found that overall dietary patterns influence microbial composition and function. It also noted that more research is needed to establish which changes cause specific health benefits.

The amounts below are serving ideas, not prescribed doses. If you currently eat little fiber, introduce these foods gradually and drink enough water; a sudden increase can cause gas, bloating, or discomfort.

Yogurt

Yogurt made with live cultures supplies microorganisms alongside protein and other nutrients. Some people who have difficulty digesting lactose may tolerate yogurt better than other dairy foods, although tolerance varies.

Try 1/2 cup of plain yogurt with oats or fruit. Check the label for live cultures and choose a version made from pasteurized milk; dairy-free versions vary in their ingredients and whether they contain live cultures.

Evidence: Live cultures make yogurt a useful option, but the broad diet-and-microbiome reviews cited here do not establish that a particular yogurt improves gut health for everyone. Added sugar and individual tolerance are also worth considering when choosing one.

Lentils

Lentils provide dietary fiber, including fiber that gut microbes can ferment. The resulting compounds include short-chain fatty acids, which help support the environment of the colon.

Start with 1/4 cup of cooked lentils in a soup, salad, or grain bowl. Canned lentils are convenient; draining and rinsing them can reduce the liquid and some of the sodium.

Evidence: A 2022 review of food components and intestinal health describes how undigested food components interact with gut microbes. It does not establish a specific lentil serving as a treatment or a guaranteed way to change someone’s microbiome.

Oats

Oats contain beta-glucan, a type of soluble fiber. Like other fibers, it contributes to the food available to gut microbes and can be part of a diet that supports regular bowel habits.

Try 1/2 cup of cooked oats for breakfast, then adjust the portion to your appetite. Plain rolled, steel-cut, or quick oats are all options; flavored packets can contain more added sugar.

Evidence: Reviews support fiber-rich dietary patterns, but they do not identify an ideal oat portion for gut health. People with celiac disease should choose oats labeled gluten-free, since ordinary oats can be contaminated with gluten-containing grains.

Sauerkraut

Sauerkraut is fermented cabbage. Some refrigerated versions contain live microorganisms, while products that have been heat-treated after fermentation may not.

Try 1 tablespoon alongside a sandwich or grain bowl and increase the amount if you enjoy and tolerate it. Check the label for live cultures if that is what you want, and compare sodium levels because sauerkraut can be salty.

Evidence: Fermented foods are plausible additions to a varied diet, but the reviews listed here do not establish that sauerkraut treats digestive symptoms or that every product has the same effect. People who are pregnant or immunocompromised should ask a clinician about the safety of unpasteurized fermented foods.

Bananas

Bananas provide fiber, and less-ripe bananas also contain resistant starch, a carbohydrate that reaches the large intestine and can be fermented by microbes. As a banana ripens, some of that starch changes to sugar.

Try 1/2 banana sliced onto yogurt or oats, or eat a whole banana as a snack if that suits your appetite. Ripeness affects taste and texture, so choose the stage you prefer rather than forcing yourself to eat an unripe fruit.

Evidence: The general role of fermentable carbohydrates is supported by diet-and-microbiome research. The supplied reviews do not show that a particular banana ripeness or portion reliably improves a person’s gut health.

Apples

Apples contain fiber, including pectin, which can be fermented by gut microbes. Eating the whole fruit also provides fiber from the peel, though you can remove it if the texture bothers you.

Try 1/2 apple with a meal or snack. Wash it before eating, and consider cooking it until soft if raw apple is uncomfortable for you.

Evidence: A review of diet and the gut microbiota describes the broader interaction between dietary components and microbes, not a proven apple prescription. Apples can also trigger symptoms in some people with irritable bowel syndrome, so more is not necessarily better for everyone.

Barley

Barley is a whole grain that contains beta-glucan and other dietary fiber. It offers another way to vary the fibers in your meals rather than relying on a single grain.

Try 1/2 cup of cooked barley in a soup or as a base for vegetables and protein. Cook a batch ahead and use it in place of a more refined grain when you want a change.

Evidence: Research reviews support the importance of dietary fiber and overall eating patterns, but they do not establish barley as superior to other whole grains for gut health. Barley contains gluten and is not suitable for people with celiac disease.

Onions

Onions contain fructans, fibers that can be fermented by gut microbes. They add flavor as well as a different type of plant component to meals.

Start with 1 tablespoon of cooked onion in a soup, omelet, or other dish. If that is comfortable, use more according to taste; cooking changes the texture and flavor but does not necessarily prevent symptoms in sensitive people.

Evidence: A 2021 review of diet and gut microbiota discusses how plant-based dietary components can influence microbial composition. It does not prove an onion dose for better gut health, and onions commonly cause symptoms for some people with irritable bowel syndrome.

Almonds

Almonds provide fiber, unsaturated fats, and plant compounds. Including nuts alongside other plant foods can add variety to an eating pattern that supports gut health.

Try 2 tablespoons of chopped almonds over oats or yogurt, or have a small handful as a snack. Choose unsalted almonds if you are trying to reduce sodium, and avoid them if you have a tree-nut allergy.

Evidence: A 2023 review of diet and human health describes common features of health-associated diets, including fiber, unsaturated fats, and plant compounds. That broader evidence does not mean almonds alone can correct a digestive problem.

Flaxseeds

Flaxseeds contain fiber and can be an easy addition to foods you already eat. Ground flaxseeds are generally easier to incorporate into a meal than whole seeds.

Start with 1 teaspoon of ground flaxseeds stirred into oats or yogurt. Increase gradually if you tolerate them, and drink enough water as part of your usual routine.

Evidence: Fiber-rich foods can support normal bowel function, but the supplied reviews do not establish a flaxseed dose for a particular gut condition. If you have a swallowing problem, a bowel obstruction, or questions about fiber and your medicines, ask a clinician before adding flaxseeds.

Which foods should you limit for gut health?

Consider limiting foods that regularly displace fiber-rich choices, particularly those high in added sugar or saturated fat and low in fiber. Examples include some packaged sweets, refined-grain snacks, and processed meats. This is about your overall pattern, not a rule that one serving will damage your gut.

Not every packaged or processed food needs to be avoided: canned lentils, frozen fruit, and plain yogurt can be convenient, nutritious choices. Compare labels and choose options that fit your needs and budget.

Personal triggers matter too. Onions, apples, lentils, and other nutritious foods can cause discomfort for some people; note the amount and pattern of symptoms rather than cutting out entire food groups without advice.

Who should be careful, and when should you see a doctor?

If you have irritable bowel syndrome, inflammatory bowel disease, celiac disease, or another digestive condition, the best fiber choices may depend on your symptoms and treatment plan. A clinician or registered dietitian can help you make changes without unnecessarily restricting your diet; do not stop prescribed medication because of a food change.

Ask a clinician about persistent changes in bowel habits, recurring abdominal pain, or unexplained weight loss. Seek urgent medical care for severe abdominal pain, black or bloody stools, or vomiting that prevents you from keeping fluids down.

During pregnancy, when choosing foods for young children, or if you have a weakened immune system, pay particular attention to food safety and ask a clinician about individual restrictions. Keep nuts in an age-appropriate form for young children because whole nuts can be a choking hazard.