Fibre-rich feed reduces nanoplastic retention in male mice
A single peer-reviewed animal experiment links higher-fibre feed to faster elimination and lower intestinal retention of labelled nanoplastic particles in male mice. Researchers tracked fluorescent polystyrene particles and examined tissue after repeated exposure. Laboratory simulations suggest that fibre can bind or surround the particles. The findings do not establish a dietary treatment or protection in humans.
Science··Night
Labelled particles reveal differences between feeds
A single peer-reviewed animal experiment tracked nanoplastics, extremely small plastic particles, in male mice given feeds containing different amounts of cellulose fibre. Researchers used aged polystyrene particles carrying fluorescent labels. After 24 hours, the standard-feed group retained an estimated 39%; medium-fibre feed reduced that estimate to 17%, and high-fibre feed to 6%. Those estimates follow fluorescence without accounting for the total mass of plastic in all organs.[1]
Tissue changes accompany repeated exposure
The study combined short-term imaging and faecal collection with examinations of tissue on days 7 and 28 following repeated exposure. Standard-feed mice showed more accumulation and greater intestinal damage. Medium-fibre feed preserved tissue integrity better, while mild crypt loss remained in the highest-fibre group. The assessment examined intestinal surface structures and cell junctions, alongside particle-associated fluorescence.[1]
Cellulose can surround particles in laboratory digestion
Simulated digestion showed cellulose trapping and surrounding particles, a proposed mechanism for limiting contact with intestinal surfaces. Only male animals were tested. Undetectable fluorescence in an organ cannot distinguish complete absence from quantities below the method’s detection limit. The experiment did not test people, establish a safe dietary amount or examine nutrition over the long term. Its feed has no demonstrated status as a human treatment.[1]
