| FLUORIDE | International Society for Fluoride Research | Table of Contents 32(1) 1999 |
SCHATZ: MORE ON PARADOXICAL EFFECTS
Neil Jenkins continues to deny that paradoxical effects with fluoride are important phenomena (Fluoride 31 (4) 245 1998).
It is not surprising that fluoride exhibits paradoxical effects. It would be surprising if it did not because paradoxical effects have been reported for many substances in many systems under a wide range of conditions.1 Paradoxical effects occur in the yields of wheat and corn fertilized with municipal solid waste compost,2 with carcinostatic agents,3 adenine,4 diethylstilbestrol,5 and many other organic and inorganic, synthetic, and naturally-occurring compounds in vitro and in vivo.
The danger of electromagnetic fields "may actually decrease with an increase in the strength of the field."6 There are well-documented reports on supralinear (paradoxical) effects of low-level radiation.7–9 "The electrical field in biomembranes is sufficient to make the protein macromolecules in the membranes behave in a non-linear dielectric manner."10
With respect to paradoxical effects, irreproducibility, and non-linearity, one researcher concluded: "You simply can’t model nonlinearity. It’s like chaos."11 Some researchers did the same experiment several times until they were convinced that the paradoxical effects they observed were real.1 Other paradoxical effects are not reproducible.1
Fluoride systems in vivo are especially complex. When we add fluoride to a biological system, that fluoride is transformed into different fluoride-containing substances, each of which has its own unique chemical, physical, and biological properties including toxicity. Furthermore, different factors are responsible for the formation and amount of each substance. Schatz et al. discussed this complexity of paradoxical effects in a 1964 review of the subject.1
Schatz et al. published the only review of paradoxical effects in the spring of 1964.1 Wainwright recognized the importance of paradoxical effects and commented on our 1964 review in the Mycologist in England in 1994.12 In October, 1964, Schatz and Martin reviewed the literature on paradoxical effects of fluoride in vitro and in vivo.13 No one has published a review of paradoxical effects since the 1964 review, although many reports of paradoxical effects have appeared in the literature since then.
What fluoride has in common with low-level radiation14 and low exposures to pesticides and other toxic chemicals which exhibit paradoxical effects is that very low doses may be harmful. Consequently, there is no such thing as a threshold level below which fluoridation is not harmful. In other words, there is no safe dose.
Albert Schatz PhD
6907 Sherman Street
Philadelphia, PA 19119,
USA
REFERENCES
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CORRECTION
On page 123 in the May 1998 issue of Fluoride (Vol. 31, No. 2), the concentration unit (given as mg/ml) at the beginning of the seventh line down from the top should have been ng/ml. We regret this inadvertent error and thank Professor Pollick for calling it to our attention.
| FLUORIDE 32 (1) 1999 pp 43-44 | International Society for Fluoride Research | |
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