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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]
Water fluoridation is the controlled addition of fluoride to a public water supply to reduce tooth decay, and is handled differently by countries across the world. [2]Water fluoridation is considered very common in the United States, Canada, Ireland, Chile and Australia where over 50% of the population drinks fluoridated water.
Pitcher or faucet-mounted water filters do not alter fluoride content; the more-expensive reverse osmosis filters remove 65–95% of fluoride, and distillation removes all fluoride. [8] Some bottled waters contain undeclared fluoride, which can be present naturally in source waters, or if water is sourced from a public supply which has been ...
Fluoride was measured at 8 milligrams per liter in the groundwater of some villages in China, while some Canadian waters contain levels of less than 0.05 milligrams per liter, according to a World ...
A little bit of fluoride strengthens teeth, but too much fluoride can cause fluorosis poisoning and tooth decay. That's what happened to this woman living in Zhijin county, China. Mark Ralston/AFP ...
In fact, 75% of fluoride intake comes from drinking water with added fluoride and from food and beverages, such as sodas and fruit juice, made with fluoridated water, according to the CDC.
Sodium fluoride: yellow is fluorine, purple is sodium. They are isoelectronic, but fluorine is bigger because its nuclear charge is lower. The alkali metals form monofluorides. All are soluble and have the sodium chloride (rock salt) structure, [47] Because the fluoride anion is basic, many alkali metal fluorides form bifluorides with the ...
Fluoride exposure limits are based on urine testing, which is used to determine the human body's capacity for ridding itself of fluoride. [69] [71] Historically, most cases of fluoride poisoning have been caused by accidental ingestion of insecticides containing inorganic fluoride. [72]