Microplastics and nanoplastics have been found throughout the human body – how worried should we be?

By Michael Richardson, Professor of Animal Development, Leiden University
Meiru Wang, Postdoctoral Researcher, Molecular Biology and Nanotoxicology, Leiden University

The world is becoming clogged with plastic. Particles of plastic so tiny they cannot be seen with the naked eye have been found almost everywhere, from the oceans’ depths to the mountain tops. They are in the soil, in plants, in animals and they are inside us. The question is: what harm, if any, are they causing?
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