The new research is the first to measure community water fluoridation exposure during childhood and any potential impact on cognition up to age 80.

Tests of intelligence and brain function showed the same results whether or not people drank fluoridated water growing up, a highly anticipated, long-term study found.

The new research, published Monday in the respected Proceedings of the National Academy of Sciences, is the first to measure community water fluoridation exposure during childhood in the U.S. and any potential impact on cognition up to age 80. The results contradict claims made by Health Secretary Robert F. Kennedy Jr. that fluoride is “industrial waste” associated with IQ loss.

Dr. Scott Tomar, head of the department of population oral health at the University of Illinois in Chicago, called the new study “quite significant.”

“I think that the public can be assured,” Tomar, who was not involved with the new research, said. “There is no association with community water fluoridation and any measure of IQ or neurodevelopment.”

The new research is the first to measure community water fluoridation exposure during childhood and any potential impact on cognition up to age 80.

The paper is here. Notably based on people who lived in Wisconsin as kids.