Probiotic from Kimchi Enhances Binding and Elimination of Intestinal Nanoplastics

In a groundbreaking development at the intersection of environmental science and microbiology, researchers from the World Institute of Kimchi (WiKim) have identified a potent biological agent capable of adsorbing and aiding the removal of nanoplastics from the human gastrointestinal tract. This innovative study, led by Drs. Se Hee Lee and Tae Woong Whon, reveals that Leuconostoc mesenteroides CBA3656, a lactic acid bacterium isolated from kimchi, exhibits remarkable capacity to bind polystyrene nanoplastics (PS-NPs), paving a promising path towards mitigating nanoplastic accumulation in organs.

Nanoplastics, defined as plastic particles less than 1 micrometer in diameter, are an escalating concern given their pervasive presence in the environment and potential infiltration into human systems through food and water. Their minute size allows them to traverse intestinal barriers, accumulating in vital organs such as the brain and kidneys, raising alarming public health questions. The urgent need for efficient biological mechanisms to counteract this threat underlies the urgency of the WiKim research.

The team’s investigation compared the adsorptive efficiency of the kimchi-derived strain CBA3656 against a known probiotic reference strain, Latilactobacillus sakei CBA3608. Under controlled laboratory conditions, the novel strain demonstrated an adsorption efficiency of 87%, marginally surpassing the reference strain’s 85%. More impressive was CBA3656’s resilience under conditions simulating the human gut environment, maintaining over 57% adsorption efficacy compared to the dramatic plummet to 3% by CBA3608. This indicates the strain’s exceptional stability in physiological contexts where nanoplastic binding must occur.

In vivo experiments using germ-free mice provided compelling evidence of the bacterium’s functional utility. Mice administered with CBA3656 exhibited more than a twofold increase in fecal nanoplastic excretion compared to those without probiotic treatment, underscoring the bacterium’s potential in facilitating nanoplastic clearance from the gastrointestinal tract. These findings are instrumental in conceptualizing probiotics not only as digestive aids but also as agents of detoxification in the face of environmental pollutants.

The study’s implications extend beyond traditional microbiology and food science, highlighting a new frontier where fermented food-derived microbes could play a critical role in tackling pollution-related health hazards. By demonstrating that kimchi lactic acid bacteria can interact with and bind synthetic environmental contaminants, the research challenges existing paradigms about microbial functions and opens avenues for biotechnological applications in nanoplastic remediation.

The problem of plastic pollution transcends ecological damage, evolving into a pressing public health crisis as micro- and nanoplastics pervade the food chain and human physiology. Conventional strategies to reduce nanoplastic accumulation in the body are limited; hence, leveraging probiotics like Leuconostoc mesenteroides introduces a novel, biologically grounded intervention. The robustness of CBA3656 in realistic gut-like environments enhances its candidacy for eventual therapeutic use.

Dr. Se Hee Lee emphasized the dual significance of this research in environmental and health contexts. He pointed out that harnessing microorganisms from fermented foods such as kimchi could inaugurate a new era of biological approaches to combat plastic pollution at the human interface. Such probiotics might serve as a frontline defense, mitigating the systemic impacts of nanoplastics that current detoxification modalities cannot adequately address.

This research also elevates the scientific value of traditional fermentation microbial resources, signifying a resurgence in examining ancient food cultures through the lens of cutting-edge environmental biomedical science. The kimchi-derived Lactobacillus, with its dual role in fermentation and pollutant binding, exemplifies the dual-use potential inherent in natural probiotics that modern science is only beginning to unravel.

Moreover, the team’s meticulous laboratory and animal model experiments set a new standard for evaluating the efficacy of microbial biosorption under physiologically relevant conditions. The simulation of human intestinal environments during testing highlights a rigorous approach aimed at bridging the gap between in vitro observations and in vivo applicability—critical for future clinical translations.

Published in the high-impact journal Bioresource Technology, which is acclaimed in Agricultural Engineering, this study promises significant influence across microbiology, environmental health, and food science disciplines. Its novel findings encourage multidisciplinary collaborations to devise practical probiotic-based strategies targeting the growing nanoplastic contamination crisis.

The World Institute of Kimchi continues to spearhead efforts to explore and exploit microbial functionalities embedded in traditional foods, underscoring their untapped potential to resolve modern environmental challenges. With plastic pollution issues escalating globally, such innovative biological solutions could mark a paradigm shift in public health interventions against invisible yet pervasive contaminants.

In summary, the identification of Leuconostoc mesenteroides CBA3656 as an efficient nanoplastic biosorbent represents a beacon of hope against the backdrop of mounting plastic pollution threats to human health. This pioneering study advances our understanding of microbe–pollutant interactions and lays the foundation for future probiotic therapies aimed at safeguarding the integrity of the human body from nanoparticulate pollutants.

News Publication Date: 15-Feb-2026

Web References:
DOI link to the article

References:
Lee, S. H., Whon, T. W., & Lee, J. (2026). Efficient biosorption of nanoplastics by food-derived lactic acid bacterium. Bioresource Technology.