Comment by nicce

> 1. The beneficial effect of fluoride occurs only when fluoride is applied externally, in contact with the tooth enamel

I think you are kinda misusing science/not science arguments.

This is indeed the scientific reason why there is flouride in the water. It is also scientific reason why some countries removed it.

In some countries people take care of their teeth on average and in other countries not so much. So there is science for why fluoridation happens. You can read many articles about the fluoride benefits for teeth and what is the impact of teeth for overall health.