Microplastics eventually turn into nanoplastics: https://www.sciencedaily.com/releases/2021/05/210504112641.htm https://www.sciencedaily.com/releases/2021/05/21

Microplastics eventually turn into nanoplastics: https://www.sciencedaily.com/releases/2021/05/210504112641.htm https://www.sciencedaily.com/releases/2021/05/210504112641.h... We don't know the long term effects of these but it looks like their presence will be an inevitability. Given that nanoplastics will be able to cross cell membranes, it would be prudent to conduct more research into them.