I didn't intend to write another post on this subject so soon after the last one, but a story on yahoo.com's news feed has really annoyed me. I know journalists these days are seriously under pressure, but that doesn't really justify taking a 'press release' from a known activist organisation and running it uncritically ie without actually looking into any of the claims made therein. You'll find the story here, & I'm going to comment on some of the claims it contains below. (I would have done it directly on the yahoo.com piece but they don't actually allow comments, grumble grumble mutter.)
Dr Paul Connett is currently visiting NZ and Australia to promote the views of the anti-fluoridation organisation FAN and its antipodean sub-groups. While he has reportedly spent 17 years 'researching' issues associated with community water fluoridation (CWF), he has published neither original research papers on this particular topic nor a systematic review of the existing scientific literature, in leading science journals. He has, however, published a book on the subject, the contents of which formed the basis of an extensive discussion on the Open Parachute science blog (also syndicated to the Science Media Centre's sciblogs.co.nz). This output doesn't really justify the 'expert' description so adroitly promoted by the FANNZ spokesperson who provided the yahoo item.
Repeated calls for a 'debate' are rather misleading as they suggest that there is in fact something to debate. In the case of the science behind CWF, as Sir Peter Gluckman has said, it is effectively settled. To call for a debate is simply an attempt to sow doubt and fear in people's minds, and any such event would be 'won' by the better demagogue and not necessarily on the basis of the actual science presented. Thus it makes perfect sense for TV3 to seek comment from Dr Jonathan Broadbent, who has a solid research record around oral health, rather than to opt for the flawed 'debate' format & so give some feeling of false equivalency to an issue where none exists.
The FANNZ claim that our health officials are "[advocating] a highly toxic chemical be added to the drinking water of over 2 million people" is an attempt to imply that this practice is doing harm. However, there is no good evidence that the fluoridated water coming from the taps actually causes significant adverse health effects. Nor have health officicals "gone into hiding" (as stated in the yahoo story), as Dr Broadbent's willingness to be interviewed clearly demonstrates,
What are the facts that FANNZ is so keen for New Zealanders to hear? The organisation certainly seems keen to obscure the evidence that community water fluoridation improves oral health (here, here, and here, for example) and is a cost-effective way of doing so. The spokesperson comments that it "is [health officials'] responsibility to provide people with real factual information" - and appears to be ignoring the fact that the National Fluoride Information Service has been set up to do just that. And just today dental health experts have provided commentary on fluoridation via the Science Media Centre.
As I've said, many large-scale systematic reviews have found that there is good evidence that ingesting fluoride reduces decay - and, contrary to the claim in the original press release - the evidence of "unacceptable health risks" is not "growing daily". For example, the claim that fluoride is implicated in development of osteosarcoma appears to be based on a single preliminary study, and is not supported by more recent large-scale analyses. Similarly the 'Harvard' review, often cited as evidence that fluoridation affects IQ, has a number of flaws, some of which were identified by the authors themselves.
Yahoo.com, it's a real pity you didn't look into this one rather more deeply.