Re:Love those khakis (Score 4, Insightful)

All the great properties of Teflon are due to its total and complete chemical inertness and stability. It doesn't react with anything in any capacity (not even on a van der walls level, thus its non-stick properties). Sure it might be harmful like helium and water if you breath too much of it or eat nothing else, but as a chemical, Teflon is probably one of the least dangerous things you can put in your body. I guess it could do something like asbestos (due to its mico-mechanical properties, not chemical), but as far as I know nothing like this is known.