PFAS have a long environmental half life (decades), but despite the nickname "forever chemicals" they don't literally persist forever. People can expect to see

PFAS have a long environmental half life (decades), but despite the nickname "forever chemicals" they don't literally persist forever. People can expect to see a drastic reduction in PFAS body burden when/if environmental emissions of these chemicals are slashed. For example, the US phased out production of the PFAS perfluorooctanoic acid (PFOA) with a series of legal actions starting in 2004: https://en.wikipedia.org/wiki/Perfluorooctanoic_acid#Legal_actions https://en.wikipedia.org/wiki/Perfluorooctanoic_acid#Legal_a... As a result, blood levels of PFOA in the US population declined by 70% since the turn of the millennium: https://www.atsdr.cdc.gov/pfas/health-effects/us-population.html https://www.atsdr.cdc.gov/pfas/health-effects/us-population.... If other PFAS are no longer emitted to the environment, levels in the human population can be expected to decline at a similar pace.