Undigested doesn’t mean it doesn’t leach anything nasty or cause problems (particularly over long periods of time.)
Some almost certainly doesn’t fully pass.
Comment on Is it safe to use pans with peeling nonstick coating?
DogMuffins@discuss.tchncs.de 11 months ago
I have no idea.
This says the PTFE passes through undigested but who knows:
FuglyDuck@lemmy.world 11 months ago
Kusimulkku@lemm.ee 11 months ago
When they’ve studied this I don’t think they’ve seen results showing that it leaches something. Doesn’t mean we couldn’t find out that it does, but as per our current understanding it seems scientifically speaking to be nasty but not dangerous.
FuglyDuck@lemmy.world 11 months ago
Kind of depends on if that pan has ever been over heated. 250 degrees C (482 f).
The monomer that results is in fact quite toxic.
Also, there are the mentioned studies of cancer from the town 3m dumped a shitload into the water, so I’m unconvinced by the one study- we all know how industry pays for favorable studies.
Kusimulkku@lemm.ee 11 months ago
If you overheat, you could get fumes that make make you feel unwell. But you’ll have to properly go over the limit and breathe in a bunch for that
When PTFE is heated above 450 °C the pyrolysis products are different and inhalation may cause acute lung injury.[2] Symptoms are flu-like (chills, headaches and fevers) with chest tightness and mild cough. Onset occurs about 4 to 8 hours after exposure to the pyrolysis products of PTFE.[3] A high white blood cell count may be seen and chest x-ray findings are usually minimal.
en.m.wikipedia.org/wiki/Polymer_fume_fever
Also, there are the mentioned studies of cancer from the town 3m dumped a shitload into the water, so I’m unconvinced by the one study- we all know how industry pays for favorable studies.
It’s not just one study, there’s been a bunch. But you’re confusing the use in cookware (the case here) and stuff like in industrial setting or as a byproduct of the manufacturing. Teflon manufacturing used to involve a chemical that was pretty harmful but it wasn’t the cookware that was the issue, it was the manufacturing and those working in and around the plants. Cookware was fine.
Perfluorooctanoic acid (PFOA), a chemical formerly used in the manufacture of PTFE products such as non-stick coated cookware, can be carcinogenic for people who are exposed to it (see Ecotoxicity).[66] Concerning levels of PFOA have been found in the blood of people who work in or live near factories where the chemical is used, and in people regularly exposed to PFOA-containing products such as some ski waxes and stain-resistant fabric coatings, but non-stick cookware was not found to be a major source of exposure, as the PFOA is burned off during the manufacturing process and not present in the finished product.[64] Non-stick coated cookware has not been manufactured using PFOA since 2013,[67] and PFOA is no longer being made in the United States.[66]
grue@lemmy.world 11 months ago
If the chunk of PTFE you ingested is getting heated to over 250 C inside your gut, you’ve got a much bigger and more immediate problem than toxicity!
amio@kbin.social 11 months ago
Call me a cynic, but I'd not really take health advice from them, let alone on something they want to sell people.