[qbxk]

sure, the plastic molecules are non-toxic, they don't have any chemical reactions with organic molecules. they're inert. safe.

but when they clump together, or when large sheets of them fall apart, you get particles. microplastics. still inert, no chemical reactions. but they get stuck in places like tiny blood vessels or tiny pockets in your intestine. not inert. not safe. not toxic, but not good

[RetroTechie]

Polymers are the result of chemical reactions. Some of the feedstock chemicals & other reaction products inevitably wind up in the plastic. Even if a tiny %.

Then there's additives. Last I read, some ~10k different ones. A good % of those known to be harmful. Or lacking data on their safety. I suspect some of those additives are way more harmful than the polymer itself (or its feedstock).

Never mind that we're ingesting a whole cocktail of these things. Interactions a go-go!