Kimchi and sauerkraut are two of the most common fermented food staples. Sauerkraut is made of a combination of cabbage and salt, while kimchi ferments vegetables such as cabbage and radishes with a mix of seasonings.
Both options are packed with good-for-you probiotics that can support a healthy digestive system, along with other nutrients. Here’s how they compare.
Their key similarities lie in their fermentation process, probiotic content, and role in gut health.
1. They Are Both Probiotic Powerhouses
The fermentation process involved in making both kimchi and sauerkraut results in beneficial gut bacteria. These probiotics are known to promote healthy gut flora and may help with digestion, immune function, and even potentially mental health.
2. They Both Undergo a Similar Fermentation Process
Whether it’s cabbage in brine for sauerkraut or spiced napa cabbage for kimchi, both foods undergo lacto-fermentation. This natural process occurs when enzymes break down the sugars in the vegetables, producing lactic acid as a byproduct.
3. They Both Have Gut Health Benefits
Because of their rich probiotic content, both kimchi and sauerkraut may help balance your gut microbiome. This can result in smoother digestion, improved nutrient absorption, and even a stronger immune response.
While they may share some similarities, kimchi and sauerkraut also have significant differences, from their ingredients to their probiotic profiles.
1. They Have Different Ingredients
The most obvious difference between the two is their ingredient lists. Kimchi is a Korean dish known for its complexity, with a seasoning mix that includes garlic, ginger, chili flakes, and frequently seafood-based elements like fish sauce or shrimp paste.
Sauerkraut, which has roots in Central and Eastern European cuisine, is much simpler: just cabbage and salt. This simplicity often makes sauerkraut more accessible for those with food allergies or dietary restrictions.
2. They Have Different Microbial Diversity
Kimchi’s mix of ingredients creates a diverse environment for microorganisms, potentially resulting in a different variety of probiotics compared to sauerkraut. This means the two may influence your gut health in slightly different ways.
3. They Offer Slightly Different Nutrients
Kimchi contains significant amounts of vitamins A and C, as well as minerals like calcium and potassium. Sauerkraut is also a source of vitamin C and potassium, but adds vitamin K, into the mix, too.
Sauerkraut
Eating more sauerkraut has been linked to a lower risk of breast cancer. In a 2021 study, this effect was strongest for women who ate a lot of these foods during both adolescence and adulthood.
Another study of 87 people found that pasteurized sauerkraut, in contrast to fresh sauerkraut, caused more noticeable changes in gut bacteria and increased levels of short-chain fatty acids (SCFAs) in the blood.
Lastly, another study found that athletes’ gut bacteria and digestion improved significantly after including sauerkraut in their diets for over ten days.
Kimchi
One study found that people who ate more kimchi tended to experience smaller increases in BMI. The study also found that moderate amounts of kimchi were associated with healthier weight trends in middle-aged and older adults.
Another study found that women who ate cabbage kimchi moderately experienced a drop in total cholesterol, triglycerides, and LDL (“bad cholesterol”) compared to women who ate less than 1 serving per day. For men, eating the same amount of kimchi was linked to higher HDL (“good cholesterol”) levels.
Finally, evidence suggests that the probiotics found in kimchi have antioxidant and anti-inflammatory properties, which can help protect the body from harmful free radicals and reduce inflammation.
Both kimchi and sauerkraut can be excellent additions to a diet, but your individual needs and preferences might determine which is the better fit.
For Spicy Flavor Seekers: Kimchi
If you enjoy bold, spicy flavors and want to explore Korean cuisine, kimchi is a great choice. It might be especially beneficial for those looking for a probiotic food with metabolic benefits or anti-inflammatory properties.
For Simplicity: Sauerkraut
For those with a simpler palate or specific dietary restrictions, sauerkraut’s minimal ingredients make it a versatile option. It’s also a fantastic choice for individuals looking for straightforward benefits to digestion and immune health.
There are some groups of people who should either avoid or limit kimchi and sauerkraut.
“Fermented foods can be helpful, but they’re high in histamine, which may be problematic for those with sensitivities,” Johannah Katz, MA, RD, an Orlando-based registered dietitian, told Health. “Those on medications like monoamine oxidase inhibitors (MAOIs) need to be extremely cautious due to the risk of interaction with tyramine, which is high in fermented foods.”
These foods can also be high in sodium, so those following a low-sodium diet should exercise caution when consuming them.
Prioritize Homemade
“Homemade versions often have more diverse live cultures,” said Katz. “When buying store-bought, always look at the nutrition label to look out for brands that do not contain vinegar. Vinegar-based products aren’t truly fermented and will not offer the same gut benefits,” added Katz.
Diane Han, MPH, RD, a weight management dietitian in San Francisco, told Health that store-bought versions are often pasteurized for a longer shelf life and tend to have lower probiotic content.
“By making your own, you also have control over which ingredients you use and how much of each to add,” she said. “You can add just enough salt and sodium-containing sauces to start the fermentation process.”
