1, magnets are neither harmful nor beneficial to the human body. There are nuclear magnets in medical equipment, and high magnetic fields with more than 3T are not harmful to the human body. It is recognized that in all radiology medical equipment, nuclear magnets are the safest. In other words, people are not afraid of magnetic fields, more afraid of radiation.
2, the composition of the magnet is iron, cobalt, nickel and other atoms, the internal structure of its atoms is relatively special, itself has a magnetic moment. Magnets are able to generate a magnetic field, with the property of attracting ferromagnetic substances such as iron, nickel, cobalt and other metals.