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Fluoridated Water and Cancer Metastasis

Fluoride reduces adhesion forces in bacteria.
Reduced adhesion forces are involved in cancer metastasis.
Fluoridated drinking water is positively correlated with cancer rates in the US.

Revelations from Germany

In 2010, researchers at Saarland University in Germany revealed that the long-hypothesized "protective layer" fluoride supposedly forms on teeth is in fact only six nanometers thick. It would take almost 10,000 such layers to span the width of a human hair. Such a minuscule layer is quickly worn away by ordinary chewing, so is unlikely able to shield teeth from decay.

In May 2013, Saarland University's Experimental Physics Department found new evidence for how fluoride knocks out cavity-causing bacteria. Fluoride reduces the adhesion force of bacteria, so they are less able to adhere to teeth, where they produce the acid that causes cavities.

The researchers tested adhesion of Streptococcus mutans, Streptococcus oralis, and Staphylococcus carnosus on hydroxyapatite (main ingredient in tooth enamel) surfaces – before and after treatment with fluoride solution. All bacteria species exhibited lower adhesion forces after fluoride treatment of the surfaces. Because fluoride reduces the ability of decay-causing bacteria to stick on teeth, it is easier to wash away these bacteria by saliva, brushing, and other activity. [Loskill et al. 2013]

The researchers said,
"Fluoride appears to weaken bacterial adhesion forces in general."

"Tumor cells that exhibit low cell-cell adhesion forces would represent a highly metastatic phenotype since they detach more easily." [Studies of adhesion forces between cancer cells]

In the majority of the human cancers it has been clearly demonstrated that alterations in the adhesion forces are implicated in the invasion and metastasis process. It is the late stage of cancer spread, a process known as metastasis, which involves the migration of neoplastic cells from one anatomical site to another, that is likely to be most affected by de-arrangement or alterations in adhesion receptor levels or function. [Golias et al. 2005]

The #2 leading cause of death in the US:
Malignant neoplasms (cancer)

In the 10 most fluoridated states, the death rate for cancer is
7.6% higher than in the 10 least fluoridated states.
See Fluoride and Life Decay.

"Cancers of the oral cavity and pharynx, colon and rectum...
were positively associated with 'optimally' fluoridated drinking water

– Takahashi et al. (2001) Regression analysis of cancer
incidence rates and water fluoride in the US (1978-1992)

The CDC continues to ignore this study, even though its own data* shows a positive association between cancer rates and fluoridated water:

Cancers of the oral cavity and pharynx average 6.4% higher,
and cancers of the colon and rectum average 5.6% higher

in the 20 states more than 80% fluoridated (average 93%)
than in the 30 states <80% fluoridated (average 58%).

*Oral Cavity and Pharynx. Crude Invasive Cancer Incidence Rates and 95% Confidence Intervals by U.S. Census Region and Division, State, and Race and Ethnicity, United States. 2013. (Table

*Colon and Rectum. Crude Invasive Cancer Incidence Rates and 95% Confidence Intervals by U.S. Census Region and Division, State, and Race and Ethnicity, United States. 2013. (Table