A groundbreaking study from the World Institute of Kimchi has revealed that a lactic acid bacterium, Leuconostoc mesenteroides CBA3656, isolated from kimchi, may play a significant role in promoting the removal of nanoplastics from the human gastrointestinal system. Nanoplastics are defined as ultrafine plastic particles measuring less than 1 micrometer, which stem from the degradation of larger plastic materials and pose a significant health risk as they can infiltrate the human body through food and drinking water.

The research team, spearheaded by Drs. Se Hee Lee and Tae Woong Whon, focused on the bacterium's ability to bind to polystyrene nanoplastics (PS-NPs) and subsequently facilitate their excretion. The findings were published in the journal Bioresource Technology.

Significance of Nanoplastics

Nanoplastics have emerged as a concerning environmental and public health issue due to their size, which allows them to cross biological barriers within the body, potentially accumulating in vital organs such as the kidneys and brain. Given that research pertaining to biological strategies aimed at mitigating nanoplastic buildup in the gastrointestinal tract is still nascent, the findings of this study provide a vital contribution to both scientific and public health discussions.

Research Findings

The study explored the adsorption capacity of the kimchi-derived strain in comparison to a reference strain, Latilactobacillus sakei CBA3608. Under controlled laboratory conditions, the strain CBA3656 demonstrated an impressive adsorption efficiency of 87% against the PS-NPs, which was comparable to the reference strain's efficiency of 85%. However, when subjected to simulated human intestinal conditions, significant variations were observed:

Strain Adsorption Efficiency Condition
CBA3656 57% Simulated intestinal conditions
CBA3608 3% Simulated intestinal conditions

This data indicates that the kimchi-derived strain exhibits a capacity to consistently bind nanoplastics even in environments that closely resemble human intestinal conditions, a feature not maintained by the reference strain.

Animal Experimentation

The research extended to animal experimentation utilizing a germ-free mouse model. The results were noteworthy: mice treated with CBA3656 exhibited a more than twofold increase in nanoplastics detected in their feces when compared to a control group that did not receive probiotics. This suggests that Leuconostoc mesenteroides CBA3656 may indeed facilitate the excretion of nanoplastics by forming aggregates with them in the intestine.

“Plastic pollution is increasingly recognized not only as an environmental issue but also as a public health concern,” stated Dr. Sehee Lee. “Our findings suggest that microbial resources from traditional fermented foods could represent a new biological approach to address this emerging challenge."

The Path Forward

The implications of this study on public health and environmental sustainability are considerable. Future research is necessary to further elucidate the biological mechanisms by which lactic acid bacteria interact with environmental micropollutants. Additionally, the scientific community aims to expand the use of kimchi microbial resources as potential therapeutic agents against microplastic accumulation.

To read the full study, please refer to the publication titled Efficient biosorption of nanoplastics by food-derived lactic acid bacterium by Jisu Lee et al., published in Bioresource Technology (2026).

To explore further the implications of plastic pollution and its effects on health, consider reviewing the following studies:

In conclusion, the research highlights the potential of kimchi-derived probiotics as a biological strategy for managing nanoplastic pollution in the human body, opening pathways for future studies focused on managing environmental toxins through dietary interventions.