Rudolf Ziegelbecker

More About: Water Issues-Water Fluoridation

...the "benefits" of water fluoridation are by far overestimated, from a scientific point

Ladies and Gentlemen,

I learned that you are discussing  water  fluoridation.

Therefore I'd like to supply you with additional information (see attachments too, please):

Years ago I worked scientifically  with my late father, an independent European fluoride expert, on  the efficacy of  water  fluoridation and I'm still following the debate.

I can assure you that the "benefits" of water fluoridation are by far overestimated, from a scientific point of view .

According to our studies: If there is a benefit, it reaches only up to about 0.3 ppm which also seems to be a reasonable limit for natural fluoride in water with respect to the side effect "dental fluorosis".

Dean's famous relation (21 cities study) is scientifically completely untenable, as demonstrated in my father's attached document "Fluoride Cancer Effectiveness" - see especially figs. 13 and 18.

There are more  independent confirmations for that tremendous overestimation of the role of fluoridation in reducing caries.

One of them is the fact that in many countries  more fluoride in water seems  NOT to be associated with less caries at all (see our attached "WHO data...." publication), even the opposite seems to be the case.

And, there are 2 known principal effects which are heavily confounding any finding of a "benefit" but, until today, are  NOT accounted for in virtually all, even very sophisticated, "scientific" studies of  water fluoridation:

Changes in tooth eruption timing, e.g. a tooth  eruption  delay of few months, can  yield purely  PRETENDED "benefits" of up to about 50% because in this case less teeth have been exposed for a shorter time at the same age (published by my father already in 1969, a re version to  not-significance  demonstrated by Komarek et al. in 2005 after correction for this influence) and

the influence of vitamin D  and sunshine which is now known  to be able to reduce caries  by far more than fluoride (William B Grant 2011, see end of "Results" in and which was recently found  (not yet published) to have confounded also the - at a first glance very impressive - (Danish) fluoride-in-water-versus-caries statistics.

The question if under these circumstances their will remain a minor benefit from fluoride, out of the frequently alleged relatively small 25%, is still an open question for sound science. This question could  remain unresolved, however, while fluoridation  might have to retreat due to legal constraints. In Europe this happened both  for legal  and scientific reasons.

If you need further documents don't hesitate to contact me.


Rudolf Ziegelbecker Jr.


Rudolf Ziegelbecker, Mag.rer.nat., Dipl.-Ing., Dr.techn.

Franckstr. 24
A-8010 Graz

Tel. 0043  316  349653


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