10 Facts about Fluoride

TroubledSoul wrote:

fluoridation of public water supplies has been a great thing. as long as the concentration does not exceed 1.0ppm, it has shown to have a significant effect on the decrease in dental caries.

3) Contrary to previous belief, fluoride has minimal benefit when swallowed. When water fluoridation first began in the 1940s and '50s, dentists said that fluoride needed to be swallowed in order to be most effective. This belief, however, has now been discredited by an extensive body of modern research (1).

According to the Centers for Disease Control, fluoride's "predominant effect is posteruptive and topical" (2). In other words, any benefits that accrue from the use of fluoride, come from the direct application of fluoride to the outside of teeth (after they have erupted into the mouth) and not from ingestion. There is no need and little benefit, therefore, exposing all other tissues to fluoride by swallowing it.




6) Ingestion of fluoride has little benefit, but many risks. Whereas fluoride's benefits come from topical contact with teeth, its risks to health (which involve many more tissues than the teeth) result from being swallowed.

Adverse effects from fluoride ingestion have repeatedly been associated with intake levels atttainable by people living in fluoridated areas. For example:

a) Risk to the brain. According to the National Research Council (NRC), fluoride can damage the brain. Animal studies conducted in the 1990s by EPA scientists found dementia-like effects at the same concentration (1 ppm) used to fluoridate water, while human studies have found adverse effects on IQ at levels as low as 0.9 ppm among children with nutrient deficiencies and 1.8 ppm among children with adequate nutrient intake. (7-10)

b) Risk to the thyroid gland. According to the NRC, fluoride is an “endocrine disrupter.” Most notably, the NRC has warned that doses of fluoride (0.1-0.3 mg/kg/day) achievable by drinking fluoridated water, may reduce the function of the thyroid among individuals with low-iodine intake. Reduction of thyroid activity can lead to loss of mental alertness, depression and weight gain (11)

c) Risk to bones. According to the NRC, fluoride can diminish bone strength and increase the risk for bone fracture. While the NRC was unable to determine what level of fluoride is safe for bones, it noted that the best available information40 suggests that fracture risk may be increased at levels as low 1.5 ppm, which is only slightly higher than the concentration (0.7-1.2 ppm) added to water for fluoridation. (12)

d) Risk for bone cancer. Animal and human studies – including a recent study from a team of Harvard scientists – have found a connection between fluoride and a serious form of bone cancer (osteosarcoma) in males under the age of 20. The connection between fluoride and osteosarcoma has been described by the National Toxicology Program as "biologically plausible." Up to half of adolescents who develop osteosarcoma die within a few years of diagnosis. (13-16)

e) Risk to kidney patients. People with kidney disease have a heightened susceptibility to fluoride toxicity. The heightened risk stems from an impaired ability to excrete fluoride from the body. As a result, toxic levels of fluoride can accumulate in the bones, intensify the toxicity of aluminum build-up, and cause or exacerbate a painful complex bone disease known as renal osteodystrophy. (17-19)