Inhaling Nanoplastics Inflames Organs and Hurts Memory
NonToxCo Research
Science & Safety Team · 4/7/2026
Rats that inhaled nanoplastics through their noses developed inflammation in their lungs, liver, and kidneys. Their memory got worse too. And UV-weathered plastics were even more toxic.
Sunlight Makes Plastic More Dangerous
Researchers exposed rats to polystyrene nanoplastics (100 nm and 600 nm) through their noses. Some particles were fresh, others had been blasted with UV light to simulate outdoor weathering. The UV-treated particles were worse in every way, according to a 2026 study in J Environ Sci.
UV irradiation shrank the particles, increased their oxidative potential, and made them more biologically reactive. This matters because plastic litter sitting in sunlight isn't just breaking down. It's becoming more toxic before you breathe it in.
Damage to Lungs, Liver, Kidneys, and Brain
The smaller 100 nm particles caused the worst liver damage, significantly raising ALT and AST enzyme levels (markers of liver injury). Both sizes triggered lung inflammation and damaged the nasal lining.
The most striking finding: rats exposed to UV-aged nanoplastics took up to 48 seconds longer to complete memory tests. Their cognitive function declined as the UV exposure of the plastics increased.
What You Can Do
Use HEPA air purifiers to trap airborne particles. Avoid stirring up dust in areas with lots of plastic. Don't burn or overheat plastic. And swap to non-toxic home essentials to cut down on plastic shedding indoors.
Also see non-toxic kitchen essentials for safer alternatives.