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Is it harmful to the body when you touch the magnet for a long time?

Magnets are not invented by humans and are natural magnetites. The ancient Greeks and Chinese discovered that there is a natural magnetized stone in nature, which is called "the magnet." This stone magically sucks up small pieces of iron and always points in the same direction after a random swing.

Early voyagers used this magnet as their earliest compass to discern the direction at sea. The earliest discovery and use of magnets should be Chinese, that is, the use of magnets to make "compass", is one of the four major inventions in China.

After thousands of years of development, today's magnets have become a powerful material in our lives. By synthesizing alloys of different materials, the same effect as that of the magnetite can be achieved, and the magnetic force can be increased.

Man-made magnets appeared in the 18th century, but the process of making stronger magnetic materials was very slow until the 1920s when Alnico was made. Subsequently, ferrite was produced in the 1950s, and rare earth magnets were produced in the 1970s [Rare Earth magnets including NdFeB and SmCo). At this point, magnetic technology has developed rapidly, and magnetic materials have also made components more compact.

The earth itself has a very strong magnetic field, so people themselves adapt to and even rely on magnetism. A weaker and stable magnetic field is good for the body, and magnetic therapy is often used in medical treatment. Electromagnetic waves are different. It is a high-energy wave whose frequency can adversely affect the body. So the magnet is not harmful to the human body.

The magnet bracelet is neither harmful nor beneficial to the human body. There are nuclear magnetic in medical equipment, and the high magnetic field has more than 3T, which is harmless to the human body. It is widely believed that nuclear magnetic is the safest of all radiology equipment. That is to say, people are not afraid of magnetic fields, and are more afraid of radiation. High magnetic fields do have a certain negative impact on the human body, but the amount of magnets in the magnet bracelet is limited, and it is impossible to affect the human body at all. Some people claim that magnets provide the magnetic force to change the physiological tissue, and even think that each cell has positive and negative poles, and some people claim that magnets can improve blood circulation. In fact, there is no evidence that the human tissue cells or any interaction between blood and magnetic fields, iron ions in red blood cells, not only ferromagnetic, or even reverse magnetic, will not be attracted by the magnetic field, it is known that hot compress will promote blood circulation, As a result, the skin turns red. If the magnet really promotes the circulation of blood, why is there no redness in the skin that is in direct contact with the magnet?

The effect of magnetic therapy is only the so-called psychological suggestive ability, and there is no very direct and obvious medical effect. The magnet bracelet constantly stimulates the wrist microcirculation system through weak magnetic lines of force, which has a very weak effect on promoting blood circulation, improving the physiological magnetic field of the human body, and eliminating fatigue. It does have certain benefits for sleep, but it is not large. Wearing a magnet bracelet for a long time does not cause any damage to the human body.

However, if the magnetic field strength of the magnet is very strong. Generally speaking, a magnet with a magnetic field strength of more than 3,000 is harmful to the human body. The harm to the human body below this standard is minimal.

Magnetic field penetration can harm the central nervous system, cardiovascular system, etc., and has an important impact on biological growth, life activities and behavioral habits.

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