Just one. Not one of those links is a long term study on ingested PTFE coatings.
Do you understand that when you eat PTFE it comes out exactly the same way it went in?
Even powerful acids can't do anything to PTFE, what makes you think the body can do anything to it?
TiO2 also has a signficant body of evidence demonstrating that it is a carcinogen when inhaled in particulate form. Just because some compound is safe in one context does NOT mean it is safe in all contexts.
> Do you understand that when you eat PTFE it comes out exactly the same way it went in?
I bet if I asked you to eat shards of glass, they would leave your body pretty close to how they went in :) Whether your body would remain unchanged is another question. While this is an extreme example, there are more subtle ways a compound could interact with the body. For instance, glyphosate has long been considered a safe compound because it "leaves the body the way it comes in." However, recent research has revealed substantial evidence that glyphosate may adversely interact with the human microbiome, which is linked to many various health conditions. This is an active thrust of a lot of new medical research that wasn't strongly considered 20 years ago. It is simply not enough to say the compound remains unchanged, the real question is whether the body is unchanged, and the body is pretty complex and our understanding is very incomplete.
It's not clear which version of the scientific method you subscribe to from your posts, but in general proving a negative is ~really, really~ hard. This list of all possible interactions in the human body with arbitrary chemicals is quite long. The list of things that have been 'proven safe' only to be considered unsafe when studied more carefully is quite long. To suggest that our knowlegde of the safety of ~any~ compound is complete is impossible.
It would be pretty interesting if it turned out that TiO2 added to food as a white colorant were responsible for the obesity pandemic --- the epidemiological correlations are about right --- but so far the evidence that it has any kind of harmful effect at all is fairly weak.
Shards of glass are commonly used as a mild abrasive in toothpaste, an inert excipient in pill formulations, and a gas reducing agent in simethicone; they go by the name "amorphous silica" or "silica gel". They're also added to grains as an insecticide in the form of diatomaceous earth. It's commonly accepted by people who study this stuff that they are absolutely harmless to humans at that size.
I did mean TiO2. There is a reason the EU considers it a carcinogen and is banning it from several classes of products.
The EU has irrationally banned all sorts of things since the witch-burners have seized control of the government apparatus. Borate fire retardants and fertilizers is one of my favorite examples.
I'm not sure dismissing all research that disagrees with me as witch-burning would be a good habit as a scientist.
I'm not dismissing research that disagrees with me as witch-burning. I'm dismissing people who disagree with literally all the research.
I think that it isn't even close to being equivalent.
> Why you insisting it must be a digestion study
You are the one who made the statement: "It's about the most inert material that you can possibly ingest." so prove it, or admit that this is your opinion and not backed by research.
I'm not even asking for research comparing the effects of the ingestion of PTFE with every other "material that you could possibly ingest", just for any data, at all, on the long term effects of ingesting PTFE.
It's my understanding that the toxicity of ingested PTFE is still an open question, that there is no consensus on the safety or dangers of Teflon in food, and no research into the effects of ingesting it over/after long periods of time (say > 20 years).
If you have actual knowledge of advancements in the science I'd like to see what was found, but otherwise let's just acknowledge that there is still far too much work to be done before we can make meaningful claims about the safety of ingesting PTFE. At best, what we can say right now is that it won't instantly kill you, but the long term effects of ingesting PTFE on the body are unknown.
Are you planning on feeding people PTFE every couple hours?
> the long term effects of ingesting PTFE on the body are unknown.
They are known. They are non-existent.
You are arguing from bad faith and profound lack of knowledge of chemistry. To even hypothesize that PTFE can do anything, anything at all, to the body would require some new magical chemistry that doesn't exist.
There is nothing in the body, nothing, that can affect the stability of the chemical bonds that make up PTFE - if you had even a tiny bit of scientific understanding you know that, and not embarrass yourself with these demands for studies.