Here is a screen shot from the Merk Veterinary Manual
It states that “FLUORIDE IS A CELLULAR POISON”
From the screen shot above.
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Fluoride exposure from the environment has been associated with natural contamination of rock, soil, and water or from industrial waste or smelting processes. Fluoride compounds have been added to human water supplies at concentrations of ~1 mg/kg to reduce dental caries. This recommendation is not universally accepted……
……. Acute fluoride exposure at high concentrations will cause corrosive damage to tissues. In contrast, chronic exposure, which is seen more frequently, causes delayed or impaired mineralization of bones and teeth. The solubility of fluoride correlates generally with the degree of toxicity. Fluoride is known to interact with various elements, including aluminum, calcium, phosphorus, and iodine. Fluoride is a cellular poison that interferes with the metabolism of essential metals such as magnesium, manganese, iron, copper, and zinc. Because bacterial metabolism may be affected in a similar manner, this attribute accounts for the use of fluoride in dental hygiene products. Soluble fluoride is rapidly absorbed; ~50% is excreted by glomerular filtration. More than 95% of the fluoride that is retained is deposited in the bones and teeth, forming hydroxyapatite after the interference with calcium metabolism and replacement of hydroxyl ions. At low levels of fluoride exposure, the solubility of the enamel is reduced, resulting in protection. At higher levels of exposure, the enamel becomes dense and brittle. If exposure occurs during pregnancy, developing bones and teeth are severely affected. Faulty, irregular mineralization of the matrix associated with altered ameloblastic, odontoblastic, or osteoblastic activity ultimately results in poor enamel formation, exostosis, sclerosis, and osteoporosis.