Press release from Health Canada regarding the use of cesium, obtained on the Internet, for the treatment of cancer:

OTTAWA – Health Canada is warning Canadians that the use of stable cesium compounds (non-radioactive form of cesium salts, primarily cesium chloride) may pose the risk of life-threatening heart problems. Cesium, primarily in the form of cesium chloride, is promoted on the Internet to prevent various forms of cancer and as a self-administered cancer treatment.
While use of radioactive cesium in radiation treatment for cancer is authorized in Canada, Health Canada has not authorized any health products containing stable cesium compounds for oral …read more