I just read some stuff that sent me on a tirade and I wanted to put it out there for others to check out. I'm as much of a health nut as anyone I know and I was FLOORED when I started looking into this. This is a well written (long) article with no less than 116 references, but those that frequent this site should appreciate the thoroughness. The research I did on my own proves this is a serious, little known issue. Below are some of the excerpts that just blew my mind (and it doesn't get any better). Read the article and do your own research, you'll be as pissed as I am! As luck would have it, it's best absorbed through the skin and pulmonary system than if taken orally (as is most stuff). Obviously where you live will affect the amount your getting on a daily basis. Here is the link to the article and link to a great website with reference links.
It is a substance that, according to government reports, has been known since 1930 to have such a powerful effect upon thyroid function, it has been used in prescription medications to treat hyperthyroidism (overactive thyroid). It can, therefore, along with our food pyramid of "dough", be reasonably marked as a suspicious agent contributing to the current epidemic of obesity and thyroid problems. (31, 32, 33, 34)
It is a substance that has also long been known to cause or exacerbate the exact periodontal disease resulting in the tooth loss that has caught the attention of the Surgeon General. In addition to being a causative agent in periodontal disease, it is a substance that is known to accumulate in the teeth and bones creating brittleness, and for this reason it has also been associated with osteoporosis and other bone diseases and disorders that are also now being seen in America.
The mysterious substance is so corrosive, when added to water it will eat its way through a titanium container. Since it will eat its way through titanium, perhaps it should not come as a great surprise to learn that it is also known to act as a severe corrosive agent on human gastric and mucosal tissues. (35, 36, 37, 38)
As Americans' afflictions continue to unfold unlike anything else that humanity has known and brought upon itself, we also learn that the material, once thought unable to cross the blood-brain barrier, crosses it rather well. It also concentrates in the pineal gland that is located within the brain. (39, 40, 41, 42)
In a recent paper authored by Myron Coplan, PE, and Roger Masters, PhD, a professor at Dartmouth, the authors discovered that a subtle but potentially lethal change in F additives took place shortly after the fluoride experimentation on Americans began. In 1947 instead of higher-grade NaF or sodium fluoride - silicofluorides, or SiFs, were substituted as the fluorinating compound in drinking water. This switch was carried out under the gross misconception that all F compounds are the same. As outlined in some largely ignored research, however, one part of SiF is substantially more potent than six parts of NaF. Despite this evidence, and despite the fact that it is now SiF rather than NaF primarily being used in American water fluoridation, Masters and Coplan found that "virtually all the extensive laboratory research on the biological properties and effects of fluoride in water has been performed using NaF rather than SiFs..." (52)
Merck gives the definition of silicofluoride as, "fluorosilicate is a compound of silicon and some other base with fluorine, such as sodium silicofluoride; fluorosilicates are sometimes used as insecticides, and are very toxic when ingested. Called also silicofluoride." (53)
While many are still assuming that the SiF compounds being added to drinking water are high-grade pharmaceuticals, the CDC's National Fluoridation Engineer has publicly stated that all fluoride compounds currently used for water fluorination are "byproducts of the phosphate fertilizer industry." (54)
Because of the toxic nature of this compound, the SiF being added to drinking water is an industrial waste that would otherwise have to be disposed of by the industry that created it, and it would have to be disposed of according to the Hazardous Materials Regulations (HAZMAT). Disposal of toxic substances under hazmat regulations, however, results in an expense for the industries.
This costly disposal dilemma - and its clever marketing remedy - was expertly summed up in a 1983 letter written by EPA's Rebecca Hanmer, (formerly the Deputy Assistant Administrator for Water), who stated that by putting the SiF waste into drinking water rather than disposing of it, an important financial savings is made for the industry. Miss Hanmer wrote that this industrial plan is "...an ideal solution to a long standing problem. By recovering by-product fluosilicic acid (sic) from fertilizer manufacturing, water and air pollution are minimized, and water authorities have a low-cost source of fluoride..." (55)
In a journal found in the National Library of Medicine, studies have shown that in doses as low as 3 mg per day, fluoride has produced toxic effects on male reproductive hormones. Despite what Americans are being told by fluoridation promoters, the negative effects of F upon both body and mind have not only been discovered, but they have also been duly reported, albeit in areas and texts that most Americans - including professionals - do not regularly access, subscribe to or read. (61, 62, 63, 64)
Perhaps the most amazing fact of all discovered by those daring to ask questions, is the fact that the F compound being added into our drinking water under a promised, medicinal claim, has not ever been approved by the FDA.