Fluoride may occur naturally but the fluoride used in municipal water
systems is anything but natural. The main chemicals used to add
fluoride to drinking water are known as “silicofluorides” (i.e.,
hydrofluorosilicic acid and sodium fluorosilicate). Silicofluorides are
not pharmaceutical-grade fluoride products (meaning: for human use),
they are unprocessed industrial by-products of the phosphate fertilizer
industry.
Since these silicofluorides undergo no purification
procedures, they can contain elevated levels of arsenic — moreso than
any other water treatment chemical. In addition, recent research
suggests that the addition of silicofluorides to water is a risk factor
for elevated lead exposure, particularly among residents who live in
homes with older pipes, which is much of the United States.
Fluoride
has long been known to be a very toxic substance and considered by
recent medical studies to be a neurotoxin. This is why fluoride has been
used in pesticides and rodenticides (to kill rats, insects, etc). It is
also why the Food and Drug Administration (FDA) now requires that all
fluoride toothpaste sold in the U.S. carry a poison warning that
instructs users to contact the poison control center if they swallow
more than used for brushing.
Excessive fluoride exposure is well
known to cause a painful bone disease (skeletal fluorosis), as well as a
discoloration of the teeth known as dental fluorosis. Excessive
fluoride exposure has also been linked to a range of other chronic
ailments including arthritis, bone fragility, dental fluorosis, glucose
intolerance, gastrointestinal distress, thyroid disease, and possibly
cardiovascular disease and certain types of cancer.
While the
lowest doses that cause some of these effects are not yet well defined,
it is clear that certain subsets of the population are particularly
vulnerable to fluoride’s toxicity. Populations that have heightened
susceptibility to fluoride include infants, individuals with kidney
disease, individuals with nutrient deficiencies (particularly calcium
and iodine), and individuals with medical conditions that cause
excessive thirst.