Studies Once Again Confirm Fluoride in The Water LOWERS IQ In Children

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Breaking news from the Intel Hub in an exclusive interview with Dr. Paul Connett discussing new studies that once again confirm Fluoride in the water lowers IQ in children.

Editor’s note: The Studies below reference control groups with fluoride levels of 0.4 to 1 mg/L which are typical of U.S. levels of fluoridation in public drinking water which showed no IQ impairment. The IQ impairments were observed “in high fluoride concentrations that are substantially above 1 mg/L “, per the abstract of the study can be found here.

The study focused on fluoride concentrations of 2.5-4.0 mg/L with the areas studied having levels in the 2-10 mg/L range. The current EPA maximum limit for fluoride in drinking water is set at 4 mg/L while recommending a voluntary limit of 2 mg/L. When fluoride is added to a public water supply, the target concentration is 0.7 mg/L. Standards for levels in bottled drinking water vary based on temperature.

Additionally, the recommended intake and tolerable intake levels are much lower for younger children and infants and per the results of this study conflict with the tolerable and recommended intake levels for those over 9 which the study appears to support are at levels which are correlated with lower IQs.

Dr. Paul Connett – New Studies Yet Again Confirm Fluoride LOWERS IQ In Children

The Intel Hub Radio with Breaking News from Dr. Paul Connett. The release will be up on the Fluoride Action Network soon.

Download the FULL Show Here
http://mp3.oraclebroadcasting.com/Intel_Hub/Intel_Hub.2011-04-03_16k.mp3

Fluoride Action Network
http://www.fluoridealert.org/

Fluoride is a subject that I have meaning to discuss with my readers, not from a conspiratorial point of view, but from a scientific point of view. With my dear wife being a licensed dental assistant an currently in dental hygiene school this is a topic that hits very close to home.

If you head over to the Flouride Action Network http://www.fluoridealert.org/ you’ll find all kinds of information on flouride and find that local and national governments all over the world are ending fluoridation of the public drinking waters.

There are many reasons to end fluoridation but since this interview as about IQ in children, here is some of the data of IQ studies and fluoridation. Again there are many reasons and many studies.

Here is some information from http://fluoridealert.org/iq.studies.html

luoride Action Network
January 2011At present, 24 studies have reported an association betwen fluoride exposure and reduced IQ. The fluoride levels in water in these studies range from 0.88 – 9.4 ppm. The citations for each of these studies are listed below.

In a recent meta-review, Tang reviewed 16 of the 24 studies cited below, and observed that the “studies found a consistent and strong association between the exposure to fluoride and low IQ.” Moreover, in a recent review by Connett & Limeback, the authors looked at 20 fluoride/IQ studies, and concluded that 18 of them found a significant effect of fluoride on IQ.

The Tang et al. study cites 16 studies, including 5 Chinese studies that had not been translated into English. FAN, which has already translated 11 Chinese studies on fluoride/IQ into English, plans to translate the 5 studies cited by Tang. The journal Fluoride published 10 of the IQ studies which FAN translated in its 2008 volume. (Ren 1989, Qin-1990, Chen-1991, Guo-1991, Li 1994, Yang 1994, Wang 1996, Hong-2001, Li-2003, Wang 2005).

In their review of the toxicology of fluoride, the committee who authored the 2006 National Research Council of the National Academies report on fluoride(NRC), cited only 4 of the 24 IQ studies in its ‘Findings on Human Cognitive Abilities’ (Li et al.,1995; Zhao et al.,1996; Lu et al.,2000; Xiang et al.,2003a).

Human Cognitive Abilities. In assessing the potential health effects of fluoride at 2-4 mg/L, the committee found three studies of human populations exposed at those concentrations in drinking water that were useful for informing its assessment of potential neurologic effects. These studies were conducted in different areas of China, where fluoride concentrations ranged from 2.5 to 4 mg/L. Comparisons were made between the IQs of children from those populations with children exposed to lower concentration of fluoride ranging from 0.4 to 1 mg/L. The studies reported that while modal IQ scores were unchanged, the average IQ scores were lower in the more highly exposed children. This was due to fewer children in the high IQ range. While the studies lacked sufficient detail for the committee to fully assess their quality and their relevance to U.S. populations, the consistency of the collective results warrant additional research on the effects of fluoride on intelligence. Investigation of other mental and physiological alterations reported in the case study literature, including mental confusion and lethargy, should also be investigated.
Ref: bottom of page 220 to page 221

The NRC report also stated:

On the basis of information largely derived from histological, chemical, and molecular studies, it is apparent that fluorides have the ability to interfere with the functions of the brain and the body by direct and indirect means. To determine the possible adverse effects of fluoride, additional data from both the experimental and the clinical sciences are needed.
http://www.nap.edu/openbook.php?record_id=11571&page=222

The 24 studies reporting an association between fluoride exposure and reduced IQ:

9 CHINESE LANGUAGE STUDIES:

(1)
Chen Y, Han F, Zhou Z, Zhang H, Jiao X, Zhang S, Huang M, Chang T, Dong Y. 2008.
Research on the intellectual development of children in high fluoride areas.
Fluoride 41(2):120–4. [Originally published in the Chinese Journal of Control of Endemic Diseases 1991;6 Suppl:99-100.]
http://www.fluorideresearch.org/412/files/FJ2008_v41_n2_p120-124.pdf
• NRC did not have this study for review.
• Translation into English paid by Fluoride Action Network.
Chinese version.

(2)
Guo X, Wang R, Cheng C, Wei W, Tang L, Wang Q, Tang D, Liu G, He G, Li S. 2008.
A preliminary investigation of the IQs of 7-13 year old children from an area with coal burning-related fluoride poisoning.
Fluoride 41(2):125–8. [Originally published in the Chinese Journal of Endemiology 1991;10(2):98-100.]
http://www.fluorideresearch.org/412/files/FJ2008_v41_n2_p125-128.pdf
• NRC did not have this study for review.
• Translation into English paid by Fluoride Action Network.
Chinese version.

(3)
Hong F, Cao Y, Yang D, and Wang H. 2008.
Research on the effects of fluoride on child intellectual development under different environments.
Fluoride 41(2):156–60. [Originally published in the Chinese Primary Health Care 2001;15(3):56-7.]
http://www.fluorideresearch.org/412/files/FJ2008_v41_n2_p156-160.pdf
• NRC did not have this study for review.
• Translation into English paid by Fluoride Action Network.
Chinese version.

(4)
Li Y, Jing X, Chen D, Lin L, and Wang Z. 2008.
The effects of endemic fluoride poisoning on the intellectual development of children in Baotou.
Fluoride 41(2):161–4. [Originally published in the Chinese Journal of Public Health Management 2003;19(4):337-8.]
http://www.fluorideresearch.org/412/files/FJ2008_v41_n2_p161-164.pdf
• NRC did not have this study for review.
• Translation into English paid by Fluoride Action Network.
Chinese version

(5)
Li Y, Jing X, Chen D, Lin L, Wanga Z.
Effect of excessive fluoride intake on mental work capacity of children and a preliminary study of its mechanism. Fluoride 41(4):336-340. [Originally published in the Journal of West China University of Medical Sciences 25(2):188-91.]
http://www.fluorideresearch.org/414/files/FJ2008_v41_n4_p336-339.pdf
• Translation into English paid for by Fluoride Action Network.
Chinese version.

(6)
Qin L, Huo S, Chen R, Chang Y, and Zhao M. 2008.
Using the Raven’s standard progressive matrices to determine the effects of the level of fluoride in drinking water on the intellectual ability of school-age children.
Fluoride 41(2):115–9. [Originally published in the Chinese Journal of the Control of Endemic Diseases 1990;5:203-4.]
http://www.fluorideresearch.org/412/files/FJ2008_v41_n2_p115-119.pdf
• NRC did not have this study for review.
• Translation into English paid for by Fluoride Action Network.
Chinese version.

(7)
Ren D, Li K, and Liu D. 2008.
A study of the intellectual ability of 8-14 year-old children in high fluoride, low iodine areas.
Fluoride 41(4):319-20. [Originally published in the Chinese Journal of Control of Endemic Diseases 1989;4(4):251.]
http://www.fluorideresearch.org/414/files/FJ2008_v41_n4_p319-320.pdf
• NRC did not have this study for review.
• Translation into English paid by Fluoride Action Network.
* Chinese version.

(8)
Wang G, Yang D, Jia F, and Wang H. 2008.
A study of the IQ levels of four- to seven-year-old children in high fluoride areas.
Fluoride 41(4)340–3. [Originally published in the Endemic Diseases Bulletin 1996;11(1):60-6.]
http://www.fluorideresearch.org/414/files/FJ2008_v41_n4_p340-343.pdf
• NRC did not have this study for review.
• Translation into English paid by Fluoride Action Network.
Chinese version.

(9)
Wang S, Zhang H, Fan W, Fang S, Kang P, Chen X, and Yu M. 2008.
The effects of endemic fluoride poisoning caused by coal burning on the physical development and intelligence of children.
Fluoride 41(4):344-8. [Originally published in the Chinese Journal of Applied Clinical Pediatrics 20(9):897-8.]
http://www.fluorideresearch.org/414/files/FJ2008_v41_n4_p344-348.pdf
• NRC did not have this study for review.
• Translation into English paid by Fluoride Action Network.
Chinese version.


9 STUDIES IN ENGLISH:

(10)
Ding Y, Yanhuigao, Sun H, Han H, Wang W, Ji X, Liu X, Sun D. 2010.
The relationships between low levels of urine fluoride on children’s intelligence, dental fluorosis in endemic fluorosis areas in Hulunbuir, Inner Mongolia, China.
Journal of Hazardous Materials [Epublished Ahead of Print, Decembe 25, 2010]
http://www.ncbi.nlm.nih.gov/pubmed/21237562
• NRC did not have this study for its review.

(11)
Li XS, Zhi JL, and Gao RO. 1995.
Effect of fluoride exposure on intelligence in children.
Fluoride 28(4):189-92.
http://www.fluorideresearch.org/414/files/FJ2008_v41_n4_p331-335.pdf
• NRC cited this study in its references.

(12)
Lin FF, Aihaiti, Zhao HX, Lin J, Jiang JY, Maimaiti, and Aiken. 1991.
The relationship of a low-iodine and high-fluoride environment to subclinical cretinism in Xinjiang.
Xinjiang Institute for Endemic Disease Control and Research; Office of Leading Group for Endemic Disease Control of Hetian Prefectural Commitlee of the Communist Party of China; and County Health and Epidemic Prevention Station, Yutian, Xinjiang.
http://www.fluoridealert.org/health/brain/lin-1991.pdf

(13)
Lu Y, Sun ZR, Wu LN, Wang X, Lu W, and Liu SS. 2000.
Effect of high-fluoride water on intelligence in children.
Fluoride 33(2):74-8.
http://www.fluorideresearch.org/332/files/FJ2000_v33_n2_p74-78.pdf
• NRC cited this study in its references.

(14)
Rocha-Amador D, Navarro ME, Carrizales L, Morales R, and Calderón J. 2007.
Decreased intelligence in children and exposure to fluoride and arsenic in drinking water.
Cad. Sa·de P·blica, Rio de Janeiro, 23 Sup 4:S579-S587.
http://www.ncbi.nlm.nih.gov/pubmed/18038039
• NRC did not have this study for review.

(15)
Trivedi MH, Verma RJ, Chinoy NJ, Patel RS, and Sathawara NG . 2007.
Effect of high fluoride water on intelligence of school children in India.
Fluoride 40(3):178–183.
http://www.fluorideresearch.org/403/files/FJ2007_v40_n3_p178-183.pdf
• NRC did not have this study for review.

(16)
Wang SX, Wang ZH, Cheng XT, et al. 2007.
Arsenic and fluoride exposure in drinking water: children’s IQ and growth in Shanyin County, Shanxi Province, China.
Environmental Health Perspectives115(4):643-647.
http://www.ehponline.org/members/2007/9270/9270.html .
• NRC did not have this study for review.

(17)
Xiang Q, Liang Y, Chen L, Wang C, Chen B, Chen X, and Zhou M. 2003a.
Effect of fluoride in drinking water on children’s intelligence.
Fluoride 36(2): 84-94.
http://www.fluorideresearch.org/362/files/FJ2003_v36_n2_p84-94.pdf
• NRC cited this study in its references.
also see:
Xiang Q, Liang Y, Zhou M, and Zang H. 2003b.
Blood lead of children in Wamiao-Xinhuai intelligence study. (Letter).
Fluoride 36(3):198-9.
http://www.fluorideresearch.org/363/files/FJ2003_v36_n3_p198-199.pdf

(18)
Zhao LB, Liang GH, Zhang DN, and Wu XR. 1996.
Effect of high-fluoride water supply on children’s intelligence.
Fluoride 29(4):190-2.
http://www.fluorideresearch.org/294/files/FJ1996_v29_n4_p190-192.pdf
• NRC cited this study in its references.

1 STUDY IN PERSIAN

(19)
Seraj B, Shahrabi M, Falahzade M, Falahzade F, and Akhondi N. 2007.
Effect of high fluoride concentration in drinking water on children’s intelligence.
Journal of Dental Medicine 19(2):80-86. [English translation by lead author.]
http://fluoridealert.org/epa08/seraj-2007.trans.pdf
• NRC did not have this study for review.
Persian version


5 CHINESE STUDIES NOT YET TRANSLATED INTO ENGLISH:

The Tang et.al. study cited the following 5 studies as reporting lowered IQ from fluoride exposure.
(FAN intends to translate these papers into English.)

(20)
Title: Effect of high level of fluoride on children’s intelligence.

Authors: An JA, Mei SZ, Liu AP et al.
Published in: Zhong Guo Di Fang Bing Fang Zhi Za Zhi 7(2):93–94. 1992. (in Chinese)

(21)
Title: Effect of fluoride on children’s intelligence.

Authors: Xu YL, Lu CS, Zhang XN
Published in: Di Fang Bing Tong Bao 9:83–84. 1994. (in Chinese)

(22)
Title: Comparison of children’s health and intelligence between the fluorosis area with altering water source and those without altering water source.

Authors: Yao LM, Deng Y, Yang SY et al (1997) Yu Fang Yi Xue Wen
Published in: Yu Fang Yi Xue Wen Xian Xin Xi 3(1):42–43. 1997. (in Chinese)

(23)
Title: Effect of high level of fluoride and arsenium on children’s intelligence.

Authors: Zhang JW, Yao H, Chen Y.
Zhong Guo Gong Gong Wei Sheng Xue Bao 17(2):119. 1998. (in Chinese)

(24)
Title: Effect of high fluoride exposure on children intelligence.

Authors: Fan ZX, Dai HX, Bai AM et al.
Published by: Huan Jing Yu Jian Kang Za Zhi 24(10):802–803. 2007. (in Chinese)


2 CHINESE STUDIES that Connett & Limeback did not list as finding an association between fluoride exposure and reduced IQ:

Hu Y, Yu Z , Ding R. (1989)
Research on the intellectual ability of 6-14 year old students in an area with endemic fluoride poisoning.
Collection of papers and abstracts of 4th China Fluoride Research Association 6:73. 1989.
Translation into English by Julian Brooke. (English translation not yet published)
• NRC did not have this study for review.
• Translation into English paid by Fluoride Action Network.
Chinese version.

Yang Y, Wang X, Guo X, Hu P. (1994)
The effects of high levels of fluoride and iodine on child intellectual ability and the metabolism of fluoride and iodine.
Chinese Journal of Epidemiology 15(4). October 1994.
Translation into English by Julian Brooke. (English translation not yet published)
• Translation into English paid by Fluoride Action Network.
Chinese version.
• Note: The paper states, “The average IQ scores of children in the high fluoride, high iodine area and the control area were 76.67±7.75 and 81.67±11.97 respectively. This difference is not significant, however the number of children showing moderately low IQ scores in the subject population is significantly higher than the control. See Table 2.”


… In humans, only five substances have so far been documented as developmental neurotoxicants: lead, methylmercury, polychlorinated biphenyls, arsenic, and toluene. From this evidence, including our own studies on some of these substances, parallels may be drawn that suggest that fluoride could well belong to the same class of toxicants, but uncertainties remain. At least 200 industrial chemicals are known to cause brain toxicity in humans, mainly adults, and they must also be suspected to harm the developing brain. Because of the individual and societal importance of optimal brain function, recognition of developmental neurotoxicity is a public health priority, and further evidence on fluoride is needed.
Potentials for Developmental Fluoride Neurotoxicity by Anna L. Choi and Phillippe Grandjean
XXVIITH Conference of the International Society for Fluoride Research, October 9-12, 2007, Beijing China

 

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