Earlier quoted context omitted.
There's no gentle way to make the complaint about I'm about to: going to Mercola.com for good health science is roughly equivalent to referring to the Flat Earth Society for good GPS algorithms. Joe Mercola has developed a multimillion dollar business which is essentially built on telling his audience that everything in the world is poisonous unless he sells it to them. When I say he's one of the folks who believe th…
The Mercola article has citations, which you ignored. There is also a link to a MIT paper which you ignored, and deals with the main ingredient in the product at hand. >When I say he's one of the folks who believe that fluoridation is a nefarious government conspiracy, I am not kidding. Fluoride lowers IQ in children an average of 15 points, per Harvard meta-analysis. https://www.hsph.harvard.edu/news/features/fluori…
No. Aside from the fact that meta-analyses are primarily a means of identifying areas for direct research because they have a strong tendency to magnify publication bias (among other problems), that's not what the cited piece concludes. Your own quote shows that the conclusion is much weaker, noting that the meta-analysis “found strong indications that fluoride may adversely affect cognitive development in children.”
Finding strong indications that it has a possibility (“may” ≠ “does”) of causing some adverse reaction is not the same as concluding that it does have any adverse impact, and even farther from any particular quantification of that impact. And the actual average result (which isn't a study conclusion on the actual impact) was 7, not 15 IQ points for “high flouride content”; to quote your source: “The average loss in IQ was reported as a standardized weighted mean difference of 0.45, which would be approximately equivalent to seven IQ points for commonly used IQ scores with a standard deviation of 15.”