University of California, Davis: The Gut Health Benefits of Sauerkraut
- Global Research Partnerships
- Apr 16
- 2 min read

Is sauerkraut more than just a tangy topping? A new University of California, Davis, study published in Applied and Environmental Microbiology suggests that the fermented cabbage could help protect your gut, which is an essential part of overall health, supporting digestion and protecting against illness.
Authors Maria Marco, professor with the Department of Food Science and Technology, and Lei Wei, a postdoctoral researcher in Marco’s lab, looked at what happens during fermentation — specifically, how the metabolites in sauerkraut compared to those in raw cabbage.
Researchers tested whether sauerkraut’s nutrients could help protect intestinal cells from inflammation-related damage. The study compared raw cabbage, sauerkraut and the liquid brine left behind from the fermentation process. The sauerkraut samples included both store-bought products and fermented cabbage made in the lab.
They found that sauerkraut helped maintain the integrity of intestinal cells, while raw cabbage and brine did not. Marco said that there was also no noticeable difference between grocery store sauerkraut and the lab-made version.
“Some of the metabolites we find in the sauerkraut are the same kind of metabolites we're finding to be made by the gut microbiome, so that gives us a little more confidence that this connection we found between the metabolites in sauerkraut and good gut health makes sense,” Marco said. “It doesn't matter, in a way, if we make sauerkraut at home or we buy it from the store; both kinds of sauerkraut seemed to protect gut function.”
Digestive benefits
Chemical analysis shows that fermentation changes cabbage’s nutritional profile, increasing beneficial metabolites such as lactic acid, amino acids and plant-based chemicals linked to gut health. These changes may explain why fermented foods are often associated with digestive benefits.
Marco said she and Wei identified hundreds of different metabolites produced during fermentation and are now working to determine which ones play the biggest role in supporting long-term gut health.