Fermented cabbage and gut barrier protection in lab tests
What it found
In lab tests on human intestinal cells, fermented cabbage protected the cell barrier from inflammation damage, while raw cabbage and brine did not.
What they found
Animal and lab studies
Barrier protection
Fermented cabbage, but not raw cabbage or brine, prevented the cytokine-induced drop in barrier resistance and the increase in permeability in Caco-2 cell monolayers.
Metabolite changes
Fermentation changed the cabbage metabolome, lowering carbohydrates and raising lactic acid, lipids, amino acid derivatives like D-PLA and ILA, and phenolic compounds.
Individual compounds
Lactate, D-PLA, and ILA, tested alone or combined, only partially protected the cell barrier, reducing permeability but not fully preventing resistance drops.
Inflammation marker
Fermented cabbage did not lower IL-8 production, and in some cases IL-8 remained high despite barrier protection.
Metabolome similarity
Lab ferments with added L. plantarum had metabolome profiles that best resembled commercial sauerkraut.
What the authors conclude
“The findings show that intestinal barrier-protective compounds are consistently enriched during cabbage fermentations, irrespective of the scale or microbial additions, which may contribute to the health-promoting potential of these foods.”
Also in their conclusions
- They conclude that intestinal barrier-protective compounds are consistently enriched during cabbage fermentations, regardless of scale or microbial additions.
- They say that the complex mixture of metabolites in a cabbage fermentation offers advantages over single metabolites to benefit intestinal health.
- They call for human studies to determine recommended intakes of fermented cabbage that will yield benefits to gut health.
How it was done
The authors wanted to understand how fermented vegetables like sauerkraut might benefit health, since the underlying mechanisms are not well known.
They made laboratory-scale sauerkraut, with and without a added Lactiplantibacillus plantarum strain, and compared it with commercial sauerkraut and raw cabbage. They applied liquid from these to human Caco-2 intestinal cells grown as a barrier, then exposed the cells to inflammatory cytokines and measured barrier damage.
What it can’t tell you
- These are lab tests on human intestinal cells grown in a dish. They can't show what happens in people eating fermented cabbage.
- The study used cell monolayers, not a whole digestive system, so it can't show how fermented cabbage affects gut health in a living person.
- The findings can't prove that eating fermented cabbage will prevent or treat any health condition.
Who paid
- Funding
- Funded by California Department of Food and Agriculture (from the PubMed record).
- Conflicts
- The authors declare no conflict of interest.
- Authors work at
- University of California Davis, USA
The paper
- Title
- The fermented cabbage metabolome and its protection against cytokine-induced intestinal barrier disruption of Caco-2 monolayers
- Type
- Study
- Evidence
- Animals and lab studies
- Summarised from
- Full text
- Licence
- CC BY. Words in quotation marks are the authors’; the rest is our summary.
- Cite
- Wei L, Marco ML (2025). The fermented cabbage metabolome and its protection against cytokine-induced intestinal barrier disruption of Caco-2 monolayers. Applied and environmental microbiology. doi:10.1128/aem.02234-24Free full textPubMed 40192297DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error