Bioresonance therapies use electronic devices to diagnose diseased internal organs and normalize the body’s electrical properties and wave emissions. This is based on a scientifically unproven idea that unhealthy cells or organs emit altered electromagnetic waves, and that changing these waves back to normal will heal the body. Treatment may involve the removal and replacement of dental alloys or amalgams, which are said to carry currents that alter the body’s electromagnetic circulatory system. These electronic devices are often promoted for treating cancer, yet none of the claims made by the promoters have been proven. In fact, the U.S. Food and Drug Administration has prosecuted numerous purveyors of electrical devices for making unsubstantiated health benefit claims.