California is at the bottom of the list in the US for having fluoride in its water supplies. As a result, children and adults here sport more cavities than is necessary.
Nevertheless, it appears that most kids in our area do get enough fluoride without any supplementation. So, except in special cases, we do NOT prescribe fluoride tablets any longer.
But surface-applied fluoride such as is found in Prevident 5000 prescriptions IS a great aid in cutting cavities for targeted adults.