Magnet Therapy: A Skeptical View

Stephen Barrett, M.D.

Magnetic devices are claimed to relieve pain and to have therapeutic value against a large number of diseases and conditions. The way to evaluate such claims is to ask whether scientific studies have been published. Pulsed electromagnetic fields—which induce measurable electric fields —have been demonstrated effective for treating slow-healing fractures and have shown promise for a few other conditions. Relatively few studies have been published on the effect on pain of small, static magnets marketed to consumers [1]. Explanations that magnetic fields “increase circulation,” “reduce inflammation,” or “speed recovery from injuries” are simplistic and are not supported by the weight of experimental evidence [2].