5 - Is it dangerous to accidentally eat a piece of coating?

The coatings are designed not to flake in normal use. If TEFAL cookware is treated incorrectly and a particle of coating is inadvertently swallowed, there is no danger. The particles are not toxic (non-stick coating is harmless to your health). They will be passed without being absorbed, like any fibre.

All non-stick coating contains PTFE, which is the abbreviated name for a remarkable plastic polymer called polytetrafluorethylene. This is the slippery ingredient that makes the non-stick finish. PTFE is made up of "tetra fluoro ethylene"; molecules that contain only carbon and fluorine. The non-stick coating is not attacked by acid or alkali bases and is very stable when heated. To cause any possible hazard to the consumer it would be necessary to heat 36 non-stick frying pans simultaneously to 400 degrees centigrade. Since in a domestic kitchen the maximum temperature possible with a pan is about 300 degrees centigrade, there is no risk should a pan be accidentally overheated. Health authorities in France, Europe, United States and other countries have approved non-stick PTFE coatings for use on cookware. Actually it is an inert substance that does not enter into chemical reactions with food, water or household cleaners. If ingested it is totally innocuous in the body. In fact, non-stick is so safe it is frequently used by the medical profession for coating heart stimulators, coating small pipes used as replacement arteries and has even been injected into patients with serious kidney conditions.

Питах първата отговорила ти дама, от къде и е инфото, защото аз самата преди време търсих. Това, което намерих е, че толкова е опасно да ползваш тези тигани (надраскани или цели), колкото да ползваш паста за зъби с флуорид, вода с флуорид, както и доста друго продукти, които ползваме във всекидневието. Както и да е, не е много ясно вредни или не са флуоридите.