Excessive ingestion of fluoride during the early childhood years can damage the tooth-forming cells, leading to a defect in the enamel known as dental fluorosis. Teeth impacted by fluorosis have visible discoloration, ranging from white spots to brown and black stains. Excessive exposure to fluoride is well known to cause a bone disease called skeletal fluorosis. Skeletal fluorosis, especially in its early stages, is a difficult disease to diagnose, and can be readily confused with various forms of arthritis including osteoarthritis and rheumatoid arthritis. In its advanced stages, fluorosis can resemble a multitude of bone/joint diseases. According to the National Toxicology Program, "the preponderance of evidence" from laboratory 'in vitro' studies indicates that fluoride is a mutagenic compound. Many substances which cause mutagenic damage also cause cancer. While the concentrations of fluoride causing mutagenic damage in laboratory studies are higher than the concentrations found in human blood, there are certain "microenvironments" in the body (e.g. the bones and the bladder) where the concentrations of fluoride can accumulate to levels comparable to, or in excess of, those causing mutagenic effects in the laboratory. Fluoride's ability to damage the brain represents one of the most active areas of research on fluoride toxicity today. The research on fluoride and the brain has been fueled by 18 human studies from China, India, Iran, and Mexico finding elevated levels of fluoride exposure to be associated with IQ deficits in children. Fluoride's impact on IQ is exacerbated among children with low-iodine exposure. Several recent studies have found that even adult exposures to fluoride may result in central nervous system disturbances, particularly among industrial workers. There are many more harmful health effects that is associated with fluoride i advise you to do research and to sign this petition for you and your family.