PFAS is teflon. If you ever cooked w/ teflon pans you probably ingested some PFAS directly from that. It's called 'forever chemicals' because it doesn't degrade, it's literally there forever (or nearly), very hard to get rid of.

There's a really good documentary called Dark Waters about a lawyer for the Chemical industry who switches sides after his home town has a lot of people get sick from Dupont poisoining people and he's been fighting a crusade against them ever since. It stars Anne Hathaway and Mark Ruffalo.