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Nutrition
Published June 2025
The Best Foods for Gut Health and What to Avoid
Written by Amanda Bloom
What you eat every single day is either feeding your gut or fighting it. The food choices you make have a direct and powerful impact on the balance of bacteria in your digestive system, how well your body breaks down and absorbs nutrients, and how comfortable you feel after every meal. The good news is that supporting your gut health through food doesn't have to be complicated or expensive. Here are the best foods you can add to your diet to start feeling the difference.
The Best Foods for Gut Health and What to Avoid

Fermented Foods

Fermented foods are one of the most powerful things you can eat for your gut. The fermentation process naturally produces beneficial bacteria that go directly into your digestive system and help populate your gut microbiome with good bacteria.

The best fermented foods to add to your diet include:

Yogurt is one of the most accessible and well studied fermented foods. Look for yogurt with live and active cultures on the label. Greek yogurt is especially high in protein and probiotics.

Kefir is a fermented milk drink that contains even more probiotic strains than yogurt. It has a slightly tangy taste and can be found in most grocery stores.

Sauerkraut is fermented cabbage that is rich in Lactobacillus bacteria. Make sure to buy the refrigerated kind, not the shelf stable version, as the live bacteria are preserved in the refrigerated variety.

Kimchi is a Korean fermented vegetable dish typically made with cabbage and spices. It's packed with beneficial bacteria and also contains fiber and antioxidants.

Kombucha is a fermented tea that contains probiotics, B vitamins, and antioxidants. It's widely available and comes in many flavors making it an easy swap for sugary drinks.

Miso is a fermented soybean paste commonly used in Japanese cooking. Even a small amount added to soups or dressings delivers a meaningful dose of beneficial bacteria.

High Fiber Foods

Fiber is essential for gut health because it acts as fuel for the beneficial bacteria already living in your digestive system. Without enough fiber, good bacteria don't have what they need to thrive and multiply.

The best high fiber foods for gut health include:

Beans and legumes like lentils, black beans, chickpeas, and kidney beans are among the highest fiber foods you can eat. They also feed beneficial bacteria particularly well.

Oats contain a specific type of fiber called beta-glucan that has been shown to support a healthy gut microbiome and reduce inflammation.

Apples contain pectin, a type of soluble fiber that feeds good gut bacteria and helps regulate digestion.

Bananas, especially slightly underripe bananas, are rich in resistant starch, a type of fiber that passes through the digestive system largely undigested and feeds beneficial gut bacteria.

Broccoli and cruciferous vegetables like broccoli, cauliflower, Brussels sprouts, and cabbage are all high in fiber and contain compounds that support a healthy gut lining.

Whole grains like brown rice, quinoa, whole wheat bread, and barley all provide fiber that supports healthy digestion and feeds your gut microbiome.

Prebiotic Foods

Prebiotics are a specific type of fiber that selectively feeds the beneficial bacteria in your gut. Think of probiotics as the good bacteria and prebiotics as the food that keeps them alive and thriving. Both are essential for a healthy gut microbiome.

The best prebiotic foods include:

Garlic is one of the most powerful prebiotic foods available. Garlic contains inulin and fructooligosaccharides that feed beneficial Bifidobacterium bacteria in the gut.

Onions are rich in inulin and are one of the best prebiotic foods you can add to your meals easily.

Leeks are another member of the allium family alongside garlic and onions and are an excellent source of prebiotic fiber.

Asparagus contains inulin and is also rich in antioxidants making it a double benefit for gut and overall health.

Jerusalem artichokes are one of the highest prebiotic fiber foods available. They can be roasted, sauteed, or added to soups.

Bananas appear on both the fiber and prebiotic list because they deliver benefits on both fronts, especially when slightly underripe.

Anti-Inflammatory Foods

Chronic inflammation in the gut disrupts your microbiome, damages your gut lining, and impairs digestion. Eating anti-inflammatory foods regularly helps calm the gut and create an environment where beneficial bacteria can thrive.

The best anti-inflammatory foods for gut health include:

Fatty fish like salmon, sardines, mackerel, and tuna are rich in omega-3 fatty acids which have been shown to reduce gut inflammation and support a healthy microbiome.

Blueberries are packed with antioxidants called polyphenols that reduce inflammation and feed beneficial gut bacteria at the same time.

Olive oil, specifically extra virgin olive oil, contains oleocanthal, a compound with powerful anti-inflammatory properties. It also supports the growth of beneficial gut bacteria.

Turmeric contains curcumin, the active compound that is one of the most well studied natural anti-inflammatory substances. Adding turmeric to your cooking or taking it as a supplement can help reduce gut inflammation significantly.

Green tea is rich in polyphenols and antioxidants that reduce inflammation and support a diverse and healthy gut microbiome.

Dark leafy greens like spinach, kale, arugula, and Swiss chard are all rich in vitamins, minerals, and anti-inflammatory compounds that support gut health and overall wellness.

Foods to Limit for Better Gut Health

Just as important as what you add to your diet is what you reduce. Certain foods actively disrupt your gut microbiome and make it harder for beneficial bacteria to thrive.

Processed sugar feeds harmful gut bacteria. A high sugar diet promotes the growth of bad bacteria and yeast in the gut while suppressing the growth of beneficial strains.

Artificial sweeteners like aspartame and sucralose have been shown in research to negatively alter gut bacteria composition despite having no calories.

Processed and ultra-processed foods are difficult to digest and disruptive to the gut microbiome.

Alcohol in excess damages the gut lining, increases intestinal permeability, and disrupts the balance of bacteria in the digestive system.

Fried foods slow digestion, promote inflammation, and are hard on the digestive system overall.

When to Consider Seeing a Doctor

Dietary changes can make a meaningful difference in your gut health, but if you're experiencing severe digestive symptoms, significant pain, unexplained weight loss, or blood in your stool, please see your healthcare provider. These symptoms can indicate conditions that require professional medical diagnosis and should not be addressed with diet and supplements alone.

How to Support Your Gut Beyond Food

Diet is the foundation of gut health but it isn't the only piece of the puzzle. Here are a few additional habits that make a real difference:

Stay hydrated. Water is essential for moving food through your digestive tract and keeping your gut lining healthy. Aim for at least 8 glasses of water a day.

Move your body. Regular physical activity has been shown to increase the diversity of gut bacteria, which is a key marker of a healthy microbiome.

Prioritize sleep. Your gut does a significant amount of repair and restoration while you sleep. Poor sleep disrupts your gut microbiome just like a poor diet does.

Manage stress. Chronic stress is one of the most damaging things for gut health. Even small daily practices like walking outside, journaling, or deep breathing can have a meaningful impact on your gut over time.

Support your gut daily with targeted supplementation. Even with the best diet, modern life makes it difficult to get everything your gut needs consistently. That's where PureComfrt comes in.

PureComfrt Digestive Enzymes Pro Blend contains 10 powerful digestive enzymes that help your body break down food efficiently after every meal, reducing bloating, improving nutrient absorption, and supporting lasting digestive comfort.*

PureComfrt Probiotic 40 Billion with Prebiotics delivers 40 billion CFUs across 4 powerful strains plus prebiotics to restore gut balance, strengthen your immune system, and keep your digestive system running smoothly every day.*

Think of food as the foundation and PureComfrt as the daily support system that fills in the gaps, so your gut gets everything it needs to keep you feeling your best.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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