United water fluoridating water
United water fluoridating water - all german 100 2016 online dating
After examining more than 2.2 million cancer death records and 125,000 cancer case records in counties using fluoridated water, the researchers found no indication of increased cancer risk associated with fluoridated drinking water (6).In 1993, the Subcommittee on Health Effects of Ingested Fluoride of the National Research Council, part of the National Academy of Sciences, conducted an extensive literature review concerning the association between fluoridated drinking water and increased cancer risk.
This is not a position statement of the American Cancer Society.
Because dental products are generally not swallowed (except, perhaps, by younger children), they cause less concern for possible health issues.
Water fluoridation began in some parts of the United States in 1945, after scientists noted that people living in areas with higher water fluoride levels had fewer cavities.
Fluorides are compounds that combine the element fluorine with another substance, usually a metal.
Examples include sodium fluoride, stannous fluoride, and fluoride monofluorophosphate (MFP fluoride).
A possible relationship between fluoridated water and cancer risk has been debated for years.
The debate resurfaced in 1990 when a study by the National Toxicology Program, part of the National Institute of Environmental Health Sciences, showed an increased number of osteosarcomas (bone tumors) in male rats given water high in fluoride for 2 years (4).
Water fluoridation is the process of adding fluoride to the water supply so the level reaches approximately 0.7 ppm, or 0.7 milligrams of fluoride per liter of water; this is the optimal level for preventing tooth decay (1). population served by public water systems had access to fluoridated water (3).
In 1945, Grand Rapids, Michigan, adjusted the fluoride content of its water supply to 1.0 ppm and thus became the first city to implement community water fluoridation. The Centers for Disease Control and Prevention (CDC) considers fluoridation of water one of the greatest achievements in public health in the 20th century.
Many decades after fluoride was first added to drinking water in some parts of the United States, there is still controversy about the possible health effects of drinking water fluoridation.
Many people have strong views either for or against water fluoridation.
Fluoride is the name given to a group of compounds that are composed of the naturally occurring element fluorine and one or more other elements.