Nanoplastics are especially concerning because their small size allows them to cross stringent biological barriers like the blood-brain, blood-testicular, and blood-follicular barriers.

“These little nanoparticles of plastic are especially concerning because those are the ones that you find in greatest abundance, or I should say among the plastics that you find in different tissues, the ones that are in greatest abundance in the brain, the testes, and the follicle.”