Magnet therapy, magnetic therapy, magnetotherapy or magnotherapy is a complementary an alternative medicine practice involving the use of static magnetic fields. Practitioners claim that subjecting certain parts of the body to magnetostatic fields produced by permanent magnets has beneficial health effects. Magnet therapy is considered pseudoscientific due to both physical and biological implausibility, as well as a lack of any established effect on health or healing.Hemoglobin is weakly diamagnetic, and is repulsed by magnetic fields. The magnets used are many orders of magnitude too weak to have any measurable effect on blood flow.