Radium was initially seen as beneficial in cancer treatment, but its use expanded into many consumer products in the early 20th century before the health risks were understood. Young women who painted watch dials with luminous radium paint in the 1920s suffered severe illnesses and death from radium poisoning, as the company told them the paint was safe despite signs of its dangers. Over 1,200 dial painters ultimately died from radium exposure, with their bodies remaining radioactive even after death due to the high doses of radium accumulated in their bones.