It's a tricky subject to get solid numbers on as most studies focus on just a limited number of the thousands of PFAs now in our environment. There's also the i

It's a tricky subject to get solid numbers on as most studies focus on just a limited number of the thousands of PFAs now in our environment. There's also the issue of identifying the source of the PFAs as they're in our water etc. Also, due to their very slow breakdown, PFAs are likely to accumulate in our bodies over time. There's more information on our current understanding here: https://www.epa.gov/pfas/our-current-understanding-human-health-and-environmental-risks-pfas https://www.epa.gov/pfas/our-current-understanding-human-hea...