I LOVE it!!! Thank you!!!
I've never seen a peer review (or peer review type) submission with so many of the notes about what changes the committee recommended and why. Especially, why. And notes about how the authors edited and why. Especially, why.
That is worth far more to me than anything it actually says. Although, I do wonder a bit about who leaked it. And will fight with my conscious about whether I should spread anything about it - later, when I'm less sleep deprived and less in need of a diversion from real life.
But about what it says...
Did you read it beyond the title? I don't think it says what you think it says.
"The NRC review considered adverse effects of water fluoride, focusing on a range of concentrations (2-4 mg/L) above the current 0.7 mg/L recommendation for community water fluoridation."
They weren't looking for the effects of fluoride at low concentrations. However, they did include them sometimes - some of the studies included them to some degree.
At first read and a little bit of going back to check things, it seems to me that the studies consistently (but not universally) found that statistically significantly lower IQ was found in children living with increased fluorine exposure only when the concentration of fluorine is greater than twice the recommended concentration. Not when it is at the recommended concentration or lower.
And the differences in IQ were increasingly greater the higher the concentration of fluorine.
Oh. I should have read the rest of it in greater detail before starting to write... on page 21 "Much of the evidence presented in the report comes from studies that involve realtively high fluoride concentrations. Little or no conclusive information can be garnered...about the effects of fluoride at low exposure concentrations (less than 1.5 mg/L). ... Drawing conclusions about the effects of low fluoride exposures (less than 1.5 mg/L) would require..."
A list of what conclusions about the effects of low fluoride exposures would require (at least for this committee's approval) is given.
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Going down a few rabbit trails from this...
I wondered if fluorine does things besides protect against tooth decay. It does. "Although fluorine is not an essential in mammalian physiology, it plays several important roles and overexposure can cause harm to every major organ system." from chapter 10 of "Essential and Toxic Trace Elements and Vitamins in Human Health" by Nour Mahmoud, et al. published 2020.
The book covers "routes of human exposure to fluorine, the beneficial effects..., metabolism, cellular processes affected by fluoride, and how organ systems and disease processes are modulated by homeostatic and pathologic fluoride exposure." Very cool! I'll look into getting this book or an older edition if there is one.
And I wondered if it is possible to be deficient in fluorine besides its effect on teeth. Evidently, it might just not be an issue because it is ubiquitous in the atmosphere and hydrosphere, and in soils and plants. That needs more looking into. Also, its relationship to Iodine in the body - hopefully, that will be in the book.
And way down the rabbit trails....
It is pretty easy to make tooth powder if you are worried about fluorine in toothpaste too. And a lot less expensive, I think - I'm not too sure about that part, i was given the clay. I think the tooth powder is better than baking soda or salt or toothpaste. I'm not particularly worried about the fluorine; I looked it up as a way to ditch the plastic tubes toothpaste comes in.