Read some background on PFOA and Teflon here.
A couple of years ago DuPont and other perfluorochemical industries were dismissing evidence of PFOA-caused cancer in rats, saying it was due to peroxisome proliferation in rats, which some argue isn't relevant to humans. However, PFOA may have other mechanisms of action (disrupting thyroid hormones, gap junctions, and estradiol among them). You can read more about the evidence in this EWG submission to the EPA. Well, EPA must not have payed too much attention to those other mechanisms because they basically ignored them and wanted to discount the…
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