Major Study: Fluoride in Water Shows No Harm to Brain Function
A major U.S. study following over 10,000 people for decades found no negative effects of fluoride in drinking water on brain function. Published in the Proceedings of the National Academy of Sciences, the research contradicts claims linking fluoride to cognitive decline. Dentists hail fluoride as a key public health achievement for preventing tooth decay.
New Study Finds No Link Between Fluoride and Cognitive Decline
A large-scale study released today offers significant findings on a long-debated public health issue: the safety of fluoride in drinking water. Researchers followed over 10,000 people for decades and found no negative effects on brain function. The study’s results were published in the respected journal Proceedings of the National Academy of Sciences.
This research comes at a time when movements to remove fluoride from water supplies have gained traction. While dentists widely support fluoride for its role in preventing tooth decay, especially in children, some states have recently banned it in public water systems.
High-profile figures, including Robert F. Kennedy Jr., have publicly stated that fluoride is an industrial waste linked to lower IQs.
Study Details and Findings
NBC News medical reporter Erika Edwards explained the study’s design and outcomes. “This was a highly anticipated study, the biggest one in the US to follow people for so many decades,” she noted. The research tracked more than 10,000 individuals who grew up in Wisconsin.
Participants took IQ tests at age 16 and then underwent cognitive testing later in life. This testing continued throughout their lives, up to age 80.
The researchers found no significant differences in cognitive outcomes between those who drank fluoridated water and those who did not. Everyone tested showed similar levels of intelligence and brainpower across their lifespan.
Fluoride’s Role in Public Health
For many years, fluoride has been recognized as a major public health success. It has played a key role in reducing tooth decay across the United States. Dentists continue to argue that the mineral is safe and effective, particularly at the low levels typically found in public water systems.
In the U.S., the standard concentration of fluoride in drinking water is about 0.7 milligrams per liter. To put this into perspective, this amount is equivalent to just three drops of fluoride in a 55-gallon barrel of water. Public health officials believe these low levels are crucial for maintaining dental health.
Potential Impact on Policy
The new study’s findings could influence ongoing debates about water fluoridation policies. Health and Human Services Secretary Robert F.
Kennedy Jr. has been a leading voice in the effort to ban fluoride from drinking water. He has claimed fluoride is linked to IQ loss and should be considered industrial waste.
However, an official from the Department of Health and Human Services (HHS) suggested that the administration’s viewpoint is unlikely to change based on this latest research. The official pointed to previous studies that found potential links between very high fluoride concentrations in water and impacts on cognitive development. They also emphasized that fluoride’s main benefit is topical, as found in toothpaste, and that questions remain about the effects of ingesting it.
Looking Ahead
The debate over fluoride in drinking water is complex, involving decades of research and public opinion. While this new study offers strong evidence of no negative cognitive effects from typical water fluoridation levels, differing views persist. Future discussions will likely continue to weigh the dental benefits against concerns raised by some about ingestion and potential health impacts.
Source: New study reveals no negative effects of fluoride on brain function (YouTube)
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