In modern pharmacology it's so clear that even if you have a fixed dose of a drug, the individuals respond very differently to one and the same dose.

Sweden rejected fluoridation in the 1970s, and in this excellent book these three scientists have confirmed the wisdom of that decision. Our children have not suffered greater tooth decay, as World Health Organization figures attest, and in turn our citizens have not borne the other hazards fluoride may cause

Well, in pharmacology, if the effect is local, it's of course absolutely awkward to use it in any other way than as a local treatment.

In Sweden, water fluoridation, to my knowledge, is no longer advocated by anybody. In Sweden, the emphasis nowadays is to keep the environment as clean as possible with regard to pharmacologically active and, thus, potentially toxic substances.

Thinking is movement confined to the brain

Fluorine has a protecting action against caries, but this is a local effect. If you drink it, you are running the risk of all kinds of toxic actions.

In modern pharmacology it's so clear that even if you have a fixed dose of a drug, the individuals respond very differently to one and the same dose.