Ken Parrot says:
“Yes, actually this quote is out of context: “The thyroid changes do worry me. There are some things there that need to be explored.” I would have liked to know what specific work he [John Doull] was referring to regarding thyroid changes. This was the reason for my query about sources. Simple scientific curiosity. I am not accusing Fagin of being malicious – only you guys.”
“The effects of fluoride on various aspects of endocrine function should be examined further, particularly with respect to a possible role in the development of several diseases or mental states in the United States” (Ch. 10, p. 267).
Doull wasn’t the only panelist to express concern in respect to fluoride’s potential negative impact on the endocrine system:
“Fluoride appears to have an anti-thyroid effect, or produce hypothyroid effects, in some individuals — meaning that it causes the overall thyroid function to be less than it should. There are several possibilities for it” (Thiessen 2006).
Thiessen has explained her concerns in more detail here. And Ken, if that is still not enough for you, we can recommend plenty of further reading, which of course you’ll never bother to do (for obvious reasons).