> In our study we performed short term uptake studies in mice with orally administered polystyrene micro-/nanoparticles (9.55 µm, 1.14 µm, 0.293 µm). We show that nanometer sized particles—but not bigger particles—reach the brain within only 2 h after gavage.
Ah, now I see your point — and it is a good one. The title should be something like "Ingested Microplastics May Break Down Into Nanoplastics Which Breach Blood-Brain Barrier"
