"Fluorides are general protoplasmic poisons, probably because of their capacity to modify the metabolism of cells by changing the permeability of the cell membrane and by inhibiting certain enzyme systems. The exact mechanism of such actions is obscure."
Journal of the American Medical Association, Sept 18, 1943, Editorial.

These 11 Associations Stopped Endorsing Water Fluoridation in 1996.

American Heart Association, American Academy of Allergy & Immunology, American Cancer Society, Chronic Fatigue Syndrome Action Network, American Diabetes Association, National Institute of Law Municipal Officers, American Chiropractic Association, American Civil Liberties Union, National Kidney Foundation, American Psychiatric Association and Society of Toxicology.