Perfluorinated chemistry is very nasty and not benign at all. The issue is not teflon, or similar plastics, but byproducts and precursors of their manufacture.

Perfluorinated chemistry is very nasty and not benign at all. The issue is not teflon, or similar plastics, but byproducts and precursors of their manufacture. They're chemically super-stable (since, like teflon, they are perflorinated) and super unreactive. That means that they persist for a very long time (until enough UV deteriorates them). However unreactive doesnt mean harmless. Sure, they have very low acute toxicity, but they still take up volume. Therefore, they interfere with the chemical reaction rates and pathways in your body. Its called steric interference, which is a fancy way of saying "something is in the way". Think of a very busy line kitchen and some guy is randomly and blindly walking into things and people.