Water Fluoridation
For decades, there have been reservations about the health effects of drinking water containing fluoride, which is often added to reduce tooth decay. Many studies have looked for a link between water fluoride levels and cancer, especially the bone cancer osteosarcoma. Such concerns stemmed from a 1990 study that found that male rats that were given water high in fluoride had an increased number of bone tumors. But of all the studies done, most have found no strong link to cancer.
