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The effect of water fluoridation on the natural environment has been investigated, and no adverse effects have been established. Issues studied have included fluoride concentrations in groundwater and downstream rivers; lawns, gardens, and plants; consumption of plants grown in fluoridated water; air emissions; and equipment noise. [54]
Fluoride's effects depend on the total daily intake of fluoride from all sources. [19] About 70–90% of ingested fluoride is absorbed into the blood, where it distributes throughout the body. In infants 80–90% of absorbed fluoride is retained, with the rest excreted, mostly via urine; in adults about 60% is retained.
All vegetation contains some fluoride, which is absorbed from soil and water. [10] Some plants concentrate fluoride from their environment more than others. All tea leaves contain fluoride; however, mature leaves contain as much as 10 to 20 times the fluoride levels of young leaves from the same plant. [18] [19] [20]
Fluoride, the chemical ion of the mineral fluorine, is naturally present in trace amounts, according to the Centers for Disease Control and Prevention, in soil, water, plants, and some food ...
Fluoride has been added to public water supplies in the U.S. since the mid 20 th century, when research made it clear that fluoride in the water could significantly reduce tooth decay, when ...
Fluoride is a naturally occurring mineral which is present in trace amounts in soil, plants, water and food, and at optimal levels helps to prevent cavities by keeping teeth strong.
The benefits of water fluoridation have lessened recently, presumably because of the availability of fluoride in other forms, but are still measurable, particularly for low-income groups. [9] Systematic reviews in 2000 and 2007 showed significant reduction of cavities in children exposed to water fluoridation.
Officials lowered their recommendation for drinking water fluoride levels in 2015 to address a tooth condition called fluorosis, that can cause splotches on teeth and was becoming more common in U ...