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SCIENCE

The Claim

Lactic acid bacteria present in kimchi can bind to intestinal microplastics and facilitate their excretion from the human body.

Verified by Lenz ·

The Short Version

The underlying science is real but overstated. A 2026 peer-reviewed study showed a kimchi-derived bacterium (Leuconostoc mesenteroides CBA3656) can adsorb polystyrene nanoplastics and increase their fecal excretion — in germ-free mice. No human clinical trials have confirmed this effect. The claim's reference to "the human body" implies proven human efficacy that does not yet exist. Additionally, only specific LAB strains were tested against specific plastic types, not the diverse microplastics humans actually encounter.

Caveats

  • All direct evidence for LAB binding and excreting microplastics comes from germ-free mouse models and in vitro experiments — no human clinical trials have been conducted.
  • The tested effect is specific to particular bacterial strains (e.g., Leuconostoc mesenteroides CBA3656) and primarily polystyrene nanoplastics, not the diverse real-world microplastic mixture humans encounter.
  • Researchers have flagged an unresolved safety concern: LAB-microplastic complexes could potentially increase the bioaccessibility of co-pollutants (heavy metals, persistent organic pollutants) sorbed onto the plastics.

The Receipts

  1. Efficient biosorption of nanoplastics by food-derived lactic acid bacterium

    Bioresource Technology

  2. Lactic acid bacteria reduce polystyrene micro- and nanoplastics-induced toxicity through their bio-binding capacity and gut environment repair ability - PubMed

    PubMed

  3. Novel probiotics adsorbing and excreting microplastics in vivo show potential gut health benefits - PMC

    PMC

  4. Microplastics and probiotics: Mechanisms of interaction and their consequences for health

    AIMS Microbiology

  5. Gut microbiome remodeling induced by microplastic exposure in humans - PMC

    PMC

  6. This Probiotic From Kimchi Can Vacuum Nanoplastics Right out of Your Gut

    ZME Science

  7. Kimchi Probiotic Aids Intestinal Nanoplastic Removal - Mirage News

    Mirage News

  8. Microplastics and probiotics: Mechanisms of interaction and their consequences for health

    KNOWLEDGE_BASE

  9. Microplastics and Nanoplastics: Effects on Gut Microbiota? - International Probiotics Association

    International Probiotics Association

  10. The Microplastics Problem and the Kraut and Kimchi Cleanup - Gutsy Ferments

    Gutsy Ferments

+ 2 more sources — see the full list on Lenz

Filed Under

Human Gastrointestinal TractKimchiLactic Acid BacteriaMicroplastics

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