I've often wondered exactly what made non-stick non-stick. It surely wasn't anything nature intended, and hearing about PFOA from JFM - thank you - has just confirmed my worst suspicions. I won't buy Teflon again, either, not that I need to. I don't know what's in my Circulon frying pans since they're hard anodyzed aluminium but they're non-stick, and as Boffy said in another thread, I love my Stellar stainless steel pans, an expensive buy at the time but an investment that's lasted decades and they still look new.
https://www.gourmetcookware.co.uk/Stellar-1000-8-Piece-Pan-Set-S1D1