High-Fiber Diet Clears Plastic From Mouse Guts
A study in mice found that daily high-fiber intake reduced plastic particle buildup and gut tissue damage.
Updated on Nov. 9, 2026 in Nutrition
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Researchers reported in Nature Communications on October 15 that mice eating a high-fiber diet cleared plastic particles from their intestines more effectively than mice on low-fiber diets. Test-tube experiments suggest fiber physically wraps around and sticks to plastic particles.
Why it matters
Scientists have linked plastic particles found in human arteries to heart attack and stroke risk, and mice that ingest tiny plastic bits can show organ injury. The findings suggest dietary fiber may offer some protection, though the study was conducted in mice.
The protective effect was observed in controlled mouse feeding experiments, with clearance measured over 24 hours and tissue damage assessed after one week of daily plastic exposure. The high-fiber mice consumed amounts well above recommended human intake, leaving human relevance unconfirmed.
The players
Eddy Y. Zeng
Eddy Y. Zeng is a researcher at South China University of Technology in Guangzhou who led the study on dietary fiber and plastic particles.
South China University of Technology
South China University of Technology is a public research university in Guangzhou, China, where the lead researcher's laboratory is based.
The details
Researchers fed mice low-, medium-, or high-fiber diets, then gave them plastic particles. Mice with more dietary fiber cleared particles faster and avoided gut damage, which appeared only in the low-fiber group after a week of daily feeding.
Timeline
October 15: Study published in Nature Communications.
Within 24 hours: Medium- and high-fiber mice cleared more plastic particles than low-fiber mice.
After one week: Gut tissue damage was observed only in the low-fiber group.
Health Landscape
Scientists have linked plastic particles found in human arteries to increased heart attack and stroke risk. This mouse study extends that research by testing whether a dietary change can reduce plastic buildup before it reaches tissue.
Adults who wish to increase fiber intake can do so through whole grains, legumes, fruits, and vegetables, though the study does not establish how much fiber would affect plastic clearance in people. The results do not change current medical guidance on plastic exposure or fiber recommendations.
The takeaway
Fiber may help the body clear some ingested plastic, but these results come from mice eating amounts far above typical human intake. Human trials would be needed before any dietary recommendation for plastic exposure can be made.
Further reading
Explore more on how diet shapes health in our Nutrition section.
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