No harm, no harm to people's health. Moreover, it is also a pot with basically the same materials. On the contrary, compared with other pots, Korean medical stone is added with high-tech non-stick coating, which can make the non-stick effect better and can be used safely. If you have any other questions, you can consult me. Friends travel to and from Korea all the year round. I use a Korean non-stick pan at home, and it works well. Besides, I need to maintain it myself. You can search for a Korean product in Taobao shop.