Question

In assessing whether fluoridated water can cause cancer, what do the National Research Council, National Health Service, and Centers for Disease Control and Prevention all agree on?

Osteosarcoma is so rare that there is little need to study the risk of fluoride.

Fluoride should not be added to water according to research from dentists.

There is a need for further research.

Answer 1

There is a need for further research.

All three agencies find no convincing evidence that fluoridated water causes cancer but conclude that additional studies (for example on osteosarcoma and long‑term effects) are warranted.