Everything I've read has said the only 'symptom' is cosmetic/ aesthetic. So it's a bit like ugly...it might not help get you laid, but you won't die from it.
New info:
"Fluoride joins lead, arsenic, methylmercury, toluene, tetrachloroethylene, and other chemicals known to cause harm to brains, reports the Fluoride Action Network (FAN). Fluoride is newly classified as a developmental neurotoxin by medical authorities in the March 2014 journal Lancet Neurology:
http://fluoridealert.org/news/fluoride-newly-identified-as-dangerous-to-brains/
Old info:
"Fluoride is a highly toxic substance. Consider, for example, the poison warning that the FDA now requires on all fluoride
toothpastes sold in the U.S. or the tens of millions of people throughout China and India who now suffer serious
crippling bone diseases from drinking water with elevated levels of fluoride.
In terms of
acute toxicity (i.e., the dose that can cause immediate toxic consequences), fluoride is more toxic than lead, but slightly less toxic than arsenic. This is why fluoride has long been used in rodenticides and pesticides to kill pests like rats and insects. It is also why accidents involving over-ingestion of fluoridated dental products–including
fluoride gels,
fluoride supplements, and
fluoridated water–can cause serious poisoning incidents, including death.
In 2001, the
union of scientists at the Environmental Protection Agency’s Headquarters Office in Washington D.C. stated: “we hold that water fluoridation is an
unreasonable risk.” The research in this section helps to demonstrate why EPA’s own scientists reached this conclusion, and why a growing number of
health professionals do so as well."
http://fluoridealert.org/issues/health/
More science, less reading:
Cue the tired old industry-sponsored ad-hominem attacks...
https://en.wikipedia.org/wiki/Dean_Burk
"We took the ten largest cities that had been fluoridated and compared them with the ten largest cities that had not been fluoridated. The fluoridation didn't start until 1952 to 1956, and has been continued ever since in the fluoridated group. Between 1940 and 1952 these two groups were identical, could not be distinguished on this curve. But from 1952 on, the curves have been continually widening to the point that there's now a difference of approximately 35,000 a year. There's no question about the data or our particular arrangement of it. The data is from government sources, which any high school student can look up and confirm. Nearly all of the fluoridation-linked cancer deaths are found to begin at the age of about 45 and then steadily increase with age. This situation is sharply different from the increased cancer deaths resulting from cigarette smoking, asbestos or hormones given to expectant mothers. Here a lag of 15 to 30 years is common. Increased death rates due to fluoridated water commence within a few years after initiation of fluoridation with marked continued increase thereafter."
In October, 1944, the
Journal of the American Medical Association published an editorial: "We do know that the use of drinking water containing as little as 1.2 to 3 ppm (parts per million) of fluorine will cause such developmental disturbances in bones as
osteosclerosis, spondylosis and osteopetrosis, as well as goiter, and we cannot afford the risk of producing such serious systemic disturbances in applying what is at present a doubtful procedure intended to prevent development of dental disfigurements."
http://www.consumerhealth.org/articles/display.cfm?ID=19990817225011