Yes, a person with healthy kidneys can only eliminate from the body 90% of the fluoride taken in from water, so someone with kidney problems will experience more fluoride retention and its associated health problems sooner and to a more severe degree.
Fluoride causes excitotoxicity in the brain thus causing brain cell death. The nerve cells that connect the higher brain functions to the cortex are particularly susceptible with the result being that long term exposure to even low levels of fluoride is a chemical lobotomy. The victim will lose awareness. Initial symptoms are the same as Adult Attention Deficit Disorder. As the victim gets progressively worse, they become more like having Alzheimer's Disease. The fluoride molecule is often attached to aluminum and can trick the blood/brain barrier into letting it pass, thus being the cause of aluminum contamination in the brain. Aluminum has been suggested as the cause of Alzheimer's. (Much of the fluoride that is added to the water comes from the waste of aluminum manufacturing process and would need to be disposed of as toxic waste if it wasn't sold to the government to be added to the water.) http://www.fluorideresearch.org/374/file...
( http://www.fluoridedebate.com )
Thorazine is one of many drugs that has fluoride as a main ingredient. http://www.sntp.net/drugs/thorazine.htm
Another health problem associated with fluoride is with the thyroid. Fluoride is an iodine antagonist, so it usurps the iodine from the thyroid causing all the symptoms of iodine deficiency even when you are getting enough iodine in the diet. When the thyroid is iodine deficient it can act erratic. It usually gives the symptoms of hypothyroidism but can also erratically give the symptoms of hyperthyroidism. This can cause the symptoms of clinical Depression and Anxiety.
So it's likely that fluoride is actually the cause of the epidemic of Depression and Anxiety that we are having in the U.S. Most anti-depressants which have fluoride as an ingredient or as an element in the active ingredient's molecular compound, have a warning that states that taking the antidepressant when not actually suffering from clinical Depression can cause Depression.
The following is from http://en.wikipedia.org/wiki/Fluoride_toxicity
"Poisoning comes from ingesting a large amount of fluoride in a short period of time. Ingesting 3?5 mg/kg may cause symptoms to appear, while the estimated lethal dose is 5?10 g (32?64 mg/kg) in adults and 16 mg/kg in children. Severity of symptoms depends upon the amount of fluoride ingested. These include abdominal pain, diarrhea, dysphagia, hypersalivation, mucosal injury, nausea, vomiting. Electrolyte abnormalities including hyperkalemia, hypocalcemia, hypoglycemia, and hypomagnesemia may occur. Neurological symptoms include headache, muscle weakness, hyperactive reflexes, muscular spasms, paresthesia seizures, tetanic contractions, and tremors. In severe cases, multi-organ failure will occur. Death typically results from cardiac arrest, shock, widening of QRS, and various arrhythmias occur."
As we can tell from the first sentence, there is a concerted effort to make fluoride in the water seem innocuous. The very people that are telling us that fluoride in the water is a good idea are the same people that once advertised that one brand of cigarettes was good for sore throats. People in white coats perhaps have the ulterior motive of wanting to keep you ill so that they can get more of your business in the form of regular visits. Western medicine as a whole tends to treat only the symptoms without attempting to remove the cause. Doctors know, for example, that cancer thrives on milk protein while normal adult cells do just as well with plant protein which cancerous cells cannot use. Yet they prescribe milk protein weight gain drinks for cancer patients taking chemotherapy. Refer to the book "The China Study." Furthermore, the cause of death will not be reported as fluoride poisoning, but instead will be reported as " cardiac arrest, shock, widening of QRS, [or] various arrhythmias " It may be that the doctor or dentist is merely following what was taught and doesn't know any better. In that case, it is up to you to recognize what your doctor, though his intentions are honest, does not.
Fluoride, even in small doses, is detrimental to everyone's health.
My sources reveal that fluoride may increase the likelihood of getting diabetes and high blood pressure.