Sorry about the formatting - I can't seem to control it. This is a very difficult forum to comment on. 

Bill, I can understand your specific obsession with the work of Till et al but you should understand that in my criticism of that work I have been consistently making the point that the problems of data dredging, p-hacking and motivated reasoning is ...

Bill - you say "Water concentration is not dosage. " True of course (if dosage has any meaning in the context of nutrition) but why don't you tell that to the people in the Till group who alternate between water F, urine F and blood plasma F as measu...

Richard, you say:"An upper limit of 1.5 ppm F in water does not protect all consumers from either dental or bone fluorosis"That is trivially true as excessive uptake of fluoride can occur from other dietary sources - toothpaste, coal fires, black tea...

Ross, that is not the finding of Aggeborn and Öhman. What they actually reported is that fluoride has a positive effect on income and well being in later life as well as on dental health. They actually say:"Fluoride has positive effects on log income...