Does Fluoride Cause Cancer?

America has been preventing tooth decay with fluoridated water for 70 years. Community water fluoridation is safe, effective and benefits everyone equitably. That’s the conclusion of every major health organization in the United States. About 75% of U.S. communities enjoy fluoridated water.

A public health practice that touches the lives of so many people must be thoroughly tested for safety. Health effects of fluoride in drinking water have been studied for more than 70 years. A large body of evidence continues to prove that fluoridation poses no risk to health, despite claims to the contrary.


Here is a sample of the valid scientific evidence from around the world showing that fluoride does not cause cancer.

Health Professionals

  • A U.S. Public Health Service review of data and research concluded that “Expert panels which reviewed this international body of literature agree that there is no credible evidence of an association between either natural fluoride or adjusted fluoride in drinking water and human cancer.”
  • A 2014 review of evidence by the Royal Society of New Zealand found that claims that fluoride contributes to the risks of cancer are not supported by the scientific evidence.
  • In 2011, the California Office of Environmental Health Hazard Assessment voted unanimously that an extensive review of scientific evidence did not support classifying fluoride as a cause of cancer.
  • International studies reviewed by the World Health Organization International Agency for Research on Cancer “have shown no consistent tendency for people living in areas with high concentrations of fluoride in the water to have higher cancer rates than those living in areas with low concentrations or for cancer mortality.”
  • A 2011 review by the European Commission’s Scientific Committee on Health and Environmental Risks (SCHER) found no link between fluoride and cancer, and classifying fluoride as a cancer-causing agent.
  • A 2011 study published by the International and American Associations for Dental Research – using extremely precise test methods – found no link between fluoride and bone cancer.

After decades of study, no link has been found between fluoride and cancer. The weight of international scientific evidence, and decades of experience in the United States and elsewhere, have demonstrated the safety and effectiveness of community water fluoridation.


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