Kimchi probiotic shows promise in flushing nanoplastics from body
Lactic acid bacteria binds to plastic particles with 87% efficiency in lab tests
1Nanoplastic health threat
Nanoplastics are sub-micron plastic particles that penetrate human tissues through food and water. Their small size allows crossing intestinal barriers, leading to accumulation in organs like kidneys and brain. Current biological solutions to prevent gastrointestinal accumulation remain experimental. The particles originate from degradation of larger plastic waste in the environment.
2Kimchi bacterium discovery
Researchers at the World Institute of Kimchi isolated Leuconostoc mesenteroides CBA3656 from kimchi. This lactic acid bacterium demonstrated exceptional ability to bind nanoplastics. Under lab conditions, it achieved 87% adsorption efficiency against polystyrene nanoplastics. The performance surpassed typical probiotic strains used as reference points in similar studies.
3Intestinal environment test
When tested under simulated human intestinal conditions, CBA3656 maintained 57% adsorption rate. This contrasts sharply with reference strain Latilactobacillus sakei CBA3608, which dropped to 3% efficiency. The results suggest kimchi-derived bacteria can function effectively in actual digestive system conditions where pH and enzymes typically reduce probiotic effectiveness.
4Animal model results
Germ-free mouse experiments showed CBA3656 administration doubled nanoplastic excretion in feces compared to controls. Both male and female mice exhibited similar results, indicating gender-independent efficacy. The findings confirm the bacterium's ability to bind nanoplastics in living organisms and facilitate their removal through normal digestive processes.
5Mechanism of action
The probiotic likely binds nanoplastics through surface interactions in the intestinal tract. This prevents particle absorption into tissues and promotes elimination. The stable performance in intestinal conditions suggests specific molecular adaptations in kimchi-derived bacteria evolved through traditional fermentation processes.
6Beyond fermentation
The study expands known applications of fermented food microbes beyond food preservation and gut health. It demonstrates their potential interaction with environmental pollutants entering the body. This represents a novel biological approach to address microplastic contamination, distinct from current physical or chemical filtration methods.
7Public health implications
With plastic pollution becoming a recognized health threat, the research offers potential dietary interventions. Traditional fermented foods might provide natural protection against nanoplastic accumulation. The findings align with growing interest in microbiome-based solutions for environmental health challenges.
8Future research directions
Scientists plan to investigate whether similar effects occur with other plastic types beyond polystyrene. Additional human trials are needed to confirm optimal dosages and delivery methods. The study opens possibilities for developing targeted probiotic formulations against specific environmental contaminants.