Is the coating of wok and electric pressure cooker toxic?

At present, the inner coating of domestic rice cookers mostly adopts polytetrafluoroethylene, which is a fluoropolymer. This material, like the material of non-stick pan, will decompose harmful substances at high temperature above 250 degrees. However, since the temperature of the rice cooker generally does not exceed 100 degrees, the cooking process is relatively safe. This material is easily corroded by acidic substances such as rice and meat. Once corroded, the coating will fall off. This kind of coating can not be decomposed in the body, and it is not easy to be excreted. It may even cause cancer if it is left in the body for a long time. Once the coating of the rice cooker at home is found to have fallen off, it should be stopped.