Kimchi Bacteria Remove Nanoplastics from Gut

Researchers at the World Institute of Kimchi (WiKim) have identified a lactic acid bacterium found in kimchi capable of binding and removing nanoplastics from the digestive system, according to findings released this week.

The bacterium, Leuconostoc mesenteroides CBA3656, isolated from the traditional Korean fermented cabbage dish, demonstrated a significant ability to adsorb polystyrene nanoplastics (PS-NPs) under simulated human intestinal conditions. While the strain exhibited an 87% adsorption efficiency in standard laboratory settings, comparable to a reference strain, it maintained a 57% adsorption rate even within a simulated human gut environment – a substantial difference, researchers noted.

“This provides the first concrete evidence that probiotics can actively assist in the detoxification of environmental contaminants,” stated WiKim in a press release. The research, led by Dr. Se Hee Lee, and Dr. Tae Woong Whon, was published in the journal Bioresource Technology.

Nanoplastics, defined as plastic particles less than one micrometer in size, originate from the breakdown of larger plastic materials and can enter the human body through food and water. Their small size allows them to potentially cross the intestinal barrier and accumulate in organs like the kidneys and brain, raising concerns about potential health impacts.

The study found that adding the kimchi-derived bacterium to the diets of test mice doubled the amount of plastic excreted in their feces. Researchers emphasize that the bacterium functions like a microscopic Velcro, effectively trapping the nanoplastics.

However, the effectiveness of the probiotic relies on adequate nourishment within the gut. WiKim’s research as well highlights the importance of prebiotic fibers, specifically those found in onions, which serve as a food source for beneficial gut bacteria. Onions contain inulin, a prebiotic fiber that supports the health and function of these bacteria.

WiKim, a state-funded research institute under the South Korean Ministry of Science and ICT, has not yet announced plans for human trials. President Hae Choon Chang has not issued a statement regarding potential commercial applications of the findings.