Criticism of these products focuses on scientific facts about magnets, including the claim that the typical magnet used in a bracelet purchased over-the-counter is not powerful enough to penetrate human skin, let alone strong enough to have a lasting effect on muscle tissue, bones, blood vessels, or organs. Notably, some people working in physics research work for hours per day with their whole body immersed in magnetic fields far stronger than those from the bracelets, and (if they observe precautions regarding pacemakers) are no more or less healthy than their peers. There are handheld neodymium magnets that produce a field of over one tesla and are often used in various hobbies. Household devices such as a garbage disposal, or an electric razor, also produce significant magnetic fields when in use.
No magnet healing product manufacturers have demonstrated scientifically that they actually achieve what they claim, and most cannot even agree on what exactly the magnetic fields do. Some claim that the magnets help to circulate the blood by some interaction with the iron in hemoglobin, a major component of red blood cells. However, in its ionised form, iron is not ferromagnetic. If it were, use of magnetic resonance imaging would instantaneously kill patients.[2] Still others claim that the magnets can restore the body's electromagnetic energy balance. There are also claims that the south pole of a magnet acts different on the body than the north pole. The list of ways that manufacturers purport that magnetic fields affect the body is almost endless.
It should be noted that many, if not most, of the websites that provide information and resources promoting the benefits of magnetic therapy belong to individuals and companies that profit from the sale of magnetic therapy products.
