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Commentary on “Are fluoride levels in drinking water associated with hypothyroidism prevalence in England? A large observational study of GP practice data and fluoride levels in drinking water”
  1. David Robert Grimes
  1. Correspondence to David Robert Grimes, Gray Labs, University of Oxford, Old Road Campus, OX3 7LE. davidrobert.grimes{at}oncology.ox.ac.uk

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The overwhelming health benefits of water fluoridation has been clearly demonstrated for decades; it’s sheer effectiveness and relatively low cost prompted the Centre for Disease Control to declare it as one of the top 10 public health achievements of the 20th century.1 Despite this, as long as there has been water fluoridation there has been an opposition to it on health grounds, although many of the arguments have been debunked.2 ,3 In this respect, water fluoridation remains controversial from a political standpoint.

The recent work published in this journal by Peckham et al4 has re-ignited the debate. However, there are numerous reasons to be sceptical of the work. First, the mantra that …

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