PTFE plumbers tape is not the cause of people getting PFAS in their bloodstream. The PRIMARY source of PFAS for most people is via the water supply [1][2] and the food supply, directly. The food supply is contaminated because the water supply is contaminated and these compounds bio-accumulate in vegetation that is irrigated with contaminated water and in animals that consume that vegetation or drink that contaminated water. As someone very concerned about this issue and that takes precautions that put me very much in the long-tail of the population, I also still use PTFE plumbers tape when doing home repairs. PTFE/Teflon is not a risk factor as long as it is not exposed to high temperatures (>350F) (and yes that means you should throw out your nonstick cookware and learn how to use cast iron and stainless steel for cooking).

In order to reduce contamination in my home's drinking water, I have a whole-home water filtration that's lab certified to NSF 53 standards (and beyond) to remove PFAS, and then for drinking and cooking usages, I further filter water via a 5-stage RO system that's certified to NSF 58 standards (and beyond). Not just drinking/cooking incurs contamination, water is aerosolized and breathed in while showering as an example. I only cook using bare metal; cast iron, carbon steel, stainless steel, glass and ceramic bakeware. Even with these precautions, I still get PFAS exposure just via the foods I eat, and being exposed in the overall environment (e.g. through rainfall).

[1]: https://www.usgs.gov/news/national-news-release/millions-us-... [2]: https://www.ewg.org/interactive-maps/pfas_contamination/