Flouride’s deteriments may well outweigh even it’s putative, and probably overstated, benefits. From Children’s Defense Fund at collectiveevolution.com:
The United States stands almost entirely alone among developed nations in adding industrial silicofluorides to its drinking water—imposing the community-wide measure without informed consent. Globally, roughly 5% of the population consumes chemically fluoridated water, but more people in the U.S. drink fluoride-adulterated water than in all other countries combined. Within the U.S., just under a third (30%) of local water supplies are not fluoridated; these municipalities have either held the practice at bay since fluoridation’s inception or have won hard-fought battles to halt water fluoridation.
The fluoride chemicals added to drinking water are unprocessed toxic wasteproducts—captured pollutants from Florida’s phosphate fertilizer industry or unregulated chemical imports from China. The chemicals undergo no purification before being dumped into drinking water and often harbor significant levels of arsenic and other heavy metal contamination; one researcher describes this unavoidable contamination as a “regulatory blind spotthat jeopardizes any safe use of fluoride additives.”
Dozens of studies and reviews—including in top-tier journals such as The Lancet—have shown that fluoride is neurotoxic and lowers children’s IQ. Fluoride is also associated with a variety of other health risks in both children and adults. However, U.S. officialdom persists in making hollow claims that water fluoridation is safe and beneficial, choosing to ignore even its own research! A multimillion-dollar longitudinal study published in Environmental Health Perspectives in September, 2017, for example, was largely funded by the National Institutes of Health and National Institute of Environmental Health Sciences—and the seminal study revealed a strong relationship between fluoride exposure in pregnant women and lowered cognitive function in offspring. Considered in the context of other research, the study’s implications are, according to the nonprofit Fluoride Action Network, “enormous”—“a cannon shot across the bow of the 80 year old practice of artificial fluoridation.”