South Korean scientists at the World Institute of Kimchi, a government-funded research body operating under the Ministry of Science and ICT, have identified a probiotic bacterium found in traditional Korean fermented cabbage that can help the human body flush out microplastics. The strain, known as Leuconostoc mesenteroides CBA3656, demonstrated a remarkable ability to bind to and remove tiny plastic particles under conditions that simulate the harsh environment of the human digestive tract.
The discovery addresses a growing public health concern as microplastics have been detected in human blood, lung tissue, and even placental tissue in recent years. These microscopic plastic fragments, shed from packaging, synthetic clothing, and degrading waste, have raised alarm among medical researchers who suspect links to inflammation, hormonal disruption, and cellular damage. Finding a safe and natural method to help the body eliminate these contaminants represents a significant step forward.
What sets the kimchi-derived strain apart from other candidates is its resilience in real-world biological conditions. While several bacterial strains have shown promise in laboratory settings for binding to microplastics, most see their effectiveness collapse dramatically when exposed to the acidic, enzyme-rich environment of the gastrointestinal tract. Competing strains tested by the research team saw their adsorption rates plummet to as low as 3 percent under simulated gut conditions, rendering them essentially useless for practical applications.
Leuchonostoc mesenteroides CBA3656, by contrast, maintained an adsorption rate of 57 percent even after passing through conditions mimicking stomach acid and intestinal enzymes. This exceptional durability likely stems from the evolutionary pressures of the kimchi fermentation process itself, where bacteria must survive in an acidic, salty environment rich in competing microorganisms. The fermentation conditions effectively pre-select for strains that can thrive in harsh digestive conditions.
The researchers validated their laboratory findings through animal trials, administering the probiotic to mice that had been fed nanoplastics. The treated mice passed more than twice the amount of nanoplastic particles in their feces compared to the control group, confirming that the bacterium actively facilitates the removal of plastic contaminants through normal digestive processes rather than allowing them to accumulate in organs and tissues.
The study was published in Bioresource Technology, a peer-reviewed journal ranked first in the field of Agricultural Engineering, lending significant credibility to the findings. The research team noted that while the results are promising, human clinical trials will be necessary before any probiotic supplement could be brought to market. They also emphasized that reducing plastic pollution at its source remains the most important strategy, with probiotic interventions serving as a complementary defense against unavoidable exposure.
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