Is Sauerkraut Good for Gut Health?

Yes, sauerkraut may support gut health when it is part of a varied diet and you tolerate it well, because its cabbage fiber can feed gut microbes and unpasteurized versions can contain live bacteria. Research is promising but limited, so start with a small amount and consider its salt content.

Is sauerkraut a good choice for gut health?

Sauerkraut is not a proven treatment for digestive conditions. For a broader look at diet, see the best foods for gut health. Both unpasteurized and pasteurized sauerkraut have been studied, and neither has been shown to produce a guaranteed benefit for everyone.

Your overall eating pattern matters more than any single food. If sauerkraut causes uncomfortable symptoms, you do not need to keep eating it for the sake of your gut.

How might sauerkraut affect the gut?

Sauerkraut is cabbage fermented by lactic acid bacteria. The cabbage provides fiber, some of which can be used by gut microbes; fiber also helps support regular bowel movements.

Unpasteurized sauerkraut may contain live bacteria from fermentation. These are not necessarily proven probiotic strains: a probiotic must have a demonstrated health benefit at a suitable amount. The types and amounts of live bacteria can also vary between products, and their presence does not guarantee that they will permanently establish themselves in your gut.

Pasteurization uses heat that kills live bacteria, but pasteurized sauerkraut still contains cabbage and other products of fermentation. Research has found changes in gut microbes after people ate either fresh or pasteurized sauerkraut, so live bacteria are not the only possible reason it might affect the gut.

Hydration also supports normal digestion; see the best drinks for gut health for more options.

What does the evidence say?

In a 2025 randomized crossover trial of 87 healthy adults, participants ate fresh or pasteurized sauerkraut daily for 4 weeks. Researchers found changes in individual gut bacterial species with both products, with more pronounced changes after pasteurized sauerkraut. The findings do not establish that those changes improve health or last after people stop eating sauerkraut.

A 2018 pilot trial involving 34 people with irritable bowel syndrome found that symptom scores improved over 6 weeks in groups eating either pasteurized or unpasteurized sauerkraut. However, there was no group that ate no sauerkraut, so the study cannot establish whether sauerkraut caused the improvement. It also does not mean sauerkraut is an IBS treatment.

Results have not been consistent across all small studies. In a 2025 pilot follow-up study of 11 active men, researchers did not replicate some earlier short-term microbiome findings after participants ate pasteurized sauerkraut. Changes in bacterial species alone do not tell us whether a person's digestion or long-term health has improved.

Overall, the studies suggest sauerkraut can interact with the gut microbiome, but larger and longer studies are needed to clarify who benefits and how.

How should you use sauerkraut?

Start with a small spoonful alongside a meal. If you feel comfortable eating it, increase the amount gradually according to your appetite and tolerance. There is no established amount of sauerkraut that everyone needs for gut health.

If you want live cultures, look for sauerkraut labeled unpasteurized or containing live cultures, and follow the storage instructions. Refrigeration alone does not guarantee that a product contains live bacteria. Vinegar-pickled cabbage is not necessarily fermented, so check the label if fermentation matters to you.

Pasteurized sauerkraut is also an option, especially if your clinician has advised you to avoid unpasteurized foods. Heating unpasteurized sauerkraut can kill its live bacteria, although the cabbage still provides fiber. Compare sodium on product labels, since sauerkraut is made with salt and products vary.

Who should be careful with sauerkraut?

Sauerkraut can cause gas, bloating or discomfort, especially if you are not used to fiber or have a sensitive gut. People with IBS may find that it aggravates symptoms even though others tolerate it. If it bothers you, reduce the amount or stop eating it and discuss persistent symptoms with a clinician or dietitian.

If you have high blood pressure, kidney disease or heart failure, or have been advised to limit sodium, check the label and ask your clinician how sauerkraut fits into your diet. If you are pregnant, are choosing food for a young child, have a weakened immune system or take immune-suppressing medication, ask a clinician whether unpasteurized fermented foods are appropriate for you.

Follow package storage directions and use clean utensils. If making sauerkraut at home, use a reliable food-safety method; discard it if you see mold, and do not taste food you suspect may be unsafe.

See a doctor for persistent or unexplained digestive symptoms. Seek urgent medical care for severe abdominal pain, black or bloody stools, or signs of dehydration.