Decay takes place in an acid environment created by sweets and refined carbohydrates. The investigators who first reported lesser decay rates in towns having naturally higher fluorine content in their waters were short-sighted in their research, as they failed to check the water and soil for other mineral values. Lo and behold, when this was done they found calcium, magnesium and a host of other elements were also present in greater amounts. On top of that, they also discovered foods and animals grown in these areas had higher mineral values and were more nutritious and healthier than those growing in other communities. Somehow, the fluorine lovers could not see that these higher mineral food values were dual reasons for immunity to tooth decay.
Fluorine is an enzyme poison.
Enzymes are important to digestion and utilization of food and thousands of other body chemistry activities. To put fluorine in the water supply to treat a disease is sheer nonsense. The dosage or amount of the chemical any one person would get would be in direct proportion to the amount of water he drinks. One who drinks twice as much water would get twice the fluorine. Tooth decay is a disease.