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Antifluoridationist literature links fluoride exposure to a wide variety of effects, including AIDS, allergy, Alzheimer's disease, arthritis, cancer, and low IQ, along with diseases of the gastrointestinal tract, kidney, pineal gland, and thyroid, though there is no scientific evidence linking fluoridation to these adverse health effects. [70] [71]
Referring to a common salt of fluoride, sodium fluoride (NaF), the lethal dose for most adult humans is estimated at 5 to 10 g (which is equivalent to 32 to 64 mg elemental fluoride/kg body weight). [ 2 ] [ 3 ] [ 4 ] Ingestion of fluoride can produce gastrointestinal discomfort at doses at least 15 to 20 times lower (0.2–0.3 mg/kg or 10 to 15 ...
The pineal gland is present in almost all vertebrates, but is absent in protochordates in which there is a simple pineal homologue. The hagfish , archaic vertebrates, lack a pineal gland. [ 7 ] In some species of amphibians and reptiles, the gland is linked to a light-sensing organ, variously called the parietal eye , the pineal eye or the ...
A new report that analyzes research on fluoride and IQ scores finds that the more fluoride a child is exposed to, the lower he or she tends to score on intelligence tests. The findings' relevance ...
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.
Fluoride levels in China and other countries tend to be much higher than in the U.S., the researchers noted. Fluoride has been added to public water supplies in the U.S. for decades.
The CDC calls the practice of adding fluoride to tap water systems one of the 10 greatest public health achievements of the last century.
Also, although fluoride affects the physiology of dental bacteria, [90] its effect on bacterial growth does not seem to be relevant to cavity prevention. [91] Fluoride's effects depend on the total daily intake of fluoride from all sources. [13] About 70–90% of ingested fluoride is absorbed into the blood, where it distributes throughout the ...