Effect of high-fluoride water on intelligence in children

  • Lu Y
  • Sun Z
  • Wu L
 et al. 
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SUMMARY: The Intelligence Quotient (IQ) was measured in 118 children, aged 10-12 years, who were life-long residents in two villages of similar population size and social, educational and economic background but differing in the level of fluoride in drinking water. The children in the high-fluoride area (drinking water fluoride 3.15 ± 0.61 mg/L [ppm]) (mean ± S.D.) had higher uri- nary fluoride levels (4.99 ± 2.57 mg/L) than the children in the low-fluoride area (drinking water fluoride 0.37 ± 0.04 mg/L) (urinary fluoride 1.43 ± 0.64 mg/L). The IQ of the 60 children in the high-fluoride area was significantly lower, mean 92.27 ± 20.45, than that of the 58 children in the low-fluoride area, mean 103.05 ± 13.86. More children in the high-fluoride area, 21.6%, were in the re- tardation (

Author-supplied keywords

  • Fluoride and IQ
  • Fluoride excretion in urine
  • Fluoride in water
  • Intelligence and fluoride

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  • Y. Lu

  • Z. R. Sun

  • L. N. Wu

  • X. Wang

  • W. Lu

  • S. S. Liu

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