"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..... 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." Wikipedia encyclopaedia