Magnetite is not harmful to the body, but beneficial on the contrary. There is a magnetic therapy method in medicine, which uses the magnetic field of a magnet to act on the magnetic field of the human body to play a therapeutic role. When the magnet is placed on the display, the magnetic field of the magnet plays a very strong role on the metal, thus changing the magnetic field of the metal in the display, so the reaction is very strong. If you do this frequently and want to see the magnetic field of the magnet clearly, you can find some metal fragments and put them on a piece of paper, and then move the metal fragments on the back of the paper with the magnet. The pattern formed by the debris is the pattern of the magnetic field movement of the magnet.

Some magnetotherapies need electricity to respond. It may have soothing and regulating effects on the body. I don't know the specific benefits. It has scientific basis. The magnetic field of a magnet acts on the magnetic field of our human body, just as you can magnetize a metal object with a magnet, such as a magnetized embroidery needle. After the magnet sweeps across its surface from beginning to end, it will be magnetic. Because I don't quite understand this, my answer may be wrong, but I hope it is correct.