A gut sponge for microplastics? Kimchi-derived probiotic sparks interest
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We know that kimchi is a healthful food in general, but what's very exciting is if we could leverage healthier diets to help us actually remove some of the microplastics.
—Austin Perlmutter, MD, via Instagram
As microplastics are increasingly detected in humans, prompting concerns about long-term health outcomes, new research suggests the gut microbiome itself may offer a potential way to eliminate these particles from the body.
Researchers from the World Institute of Kimchi have identified a probiotic strain from kimchi that may help remove nanoplastics from the gut. Rather than altering the microbiome in the usual way, this bacterium appears to physically bind plastic particles, acting like a biological “sponge” that reduces their availability in the intestinal tract.[]
For clinicians, this research identifies a potential contributor to chronic disease pathways like inflammation and oxidative stress.
Kimchi: Microplastic crusader?
In lab studies, the probiotic strain showed strong binding to polystyrene nanoplastics. In mice, this translated into increased excretion, with more nanoplastics eliminated in stool compared to controls.[]
Related: Have you heard of the 'kimchi cancer epidemic'?"It's still preclinical, we don't have this data in humans,” Austin Perlmutter, MD, an internal medicine physician and author, said in an Instagram Reel. “We know that kimchi is a healthful food in general, but what's very exciting is if we could leverage healthier diets to help us actually remove some of the microplastics, I think that would be incredibly advantageous for so many people."
How plastics reshape the gut microbiome
Microplastics and nanoplastics enter the body through everyday exposure, and it's happening more routinely than patients realize. There are three main routes: ingestion, inhalation, and skin contact, with the first two doing most of the work.[]
"Many studies are finding microplastics in different human biological samples, including the liver, kidney, brain, placenta, and the intestinal tract,” Manasi Agrawal, MD, MS, assistant professor of medicine (gastroenterology) and environmental medicine at the Icahn School of Medicine at Mount Sinai, said in a blog post. “And growing data suggest they may have negative effects on a variety of human health outcomes."[]
The most consistent signals of microplastic and nanoplastic exposure in the body are inflammation, oxidative stress, and possible endocrine effects. These particles may trigger the same pathways we already associate with chronic disease. There are also early links to metabolic and cardiovascular outcomes, but the data aren't strong enough yet to draw firm conclusions.[]
Additional research links microplastic and nanoplastic exposure with respiratory conditions like asthma and possibly lung cancer, gastrointestinal disorders like inflammatory bowel disease, and neurologic symptoms such as fatigue or dizziness. There's also concern about disruption of the gut microbiome and immune responses.[]
What this means for the clinic
What should clinicians take away from this emerging research? Here are a few early signals that may shape how we think about microplastic exposure and interventions.
We may be looking at an entirely new way to manage environmental exposures in the gut. Instead of changing the microbiome indirectly, this probiotic appears to physically bind nanoplastics and help carry them out of the body—more like a biologic “sponge” than a traditional probiotic effect.
Nanoplastic exposure is happening constantly. Patients are taking these particles in every day through food, water, and air, and the emerging signal is that they can drive inflammation, oxidative stress, and other pathways we already associate with chronic disease.
It’s an intriguing concept, but not quite ready for clinical use. The data are still preclinical and highly strain-specific, so while this opens the door to future interventions, it’s too early to translate into recommendations around probiotics or diet for nanoplastic clearance.