You insane conspiracy kooks. — Uh, I mean the Journal of the American Medical Association:

An influential medical journal published a study Monday that links fluoride consumption during pregnancy with lower childhood IQs—a finding that could undermine decades of public-health messaging, fire up conspiracy theorists, and alarm mothers-to-be.

The research was expected to be so controversial that JAMA Pediatrics included an editor’s note saying the decision to publish it was not easy and that it was subjected to “additional scrutiny.”

“It is the only editor’s note I’ve ever written,” Dimitri Christakis, editor in chief of JAMA Pediatrics and a pediatrician, told The Daily Beast. “There was concern on the journal’s editorial team about how this would play out in the public eye and what the public-health implications would be.”

About three-fourths of the United States drinks fluoridated tap water—which the U.S. Centers for Disease Control and Prevention declared one of the 10 greatest public-health achievements of the 20th century because it dramatically reduces tooth decay.

A handful of earlier studies have suggested that prenatal fluoride exposure could affect neurodevelopment, but many experts considered those to be substandard. The new study, vetted by the premier medical publisher in the U.S., is seen as more rigorous.

“When we started in this field, we were told that fluoride is safe and effective in pregnancy,” said study co-author Christine Till of York University in Toronto. “But when we looked for the evidence to suggest that it’s safe, we didn’t find any studies done on pregnant women.”

They recruited 512 pregnant women from six Canadian cities and measured their exposure several ways: analyzing the amount of fluoride in their urine; looking at how much tap water and tea they drank; and comparing the fluoride concentration in the community drinking water.

Then, when the women’s children were 3 or 4, the researchers gave them IQ tests and crunched the numbers to see if they could find any trends.

“We saw an association between prenatal fluoride exposure and lower IQ scores in children,” study author Rivky Green said.

Specifically, they found a 1 mg per liter increase in concentration of fluoride in urine was associated with a 4.5 point decrease in IQ among boys, though not girls. Another translation: The boys of mothers with the most fluoride in the urine had IQs about 3 points lower than the boys of mothers with the least amount.

When the researchers measured fluoride exposure by examining the women’s fluid intake, they found lower IQs in both boys and girls: A 1 mg increase per day was associated with a 3.7-point  IQ deficit among both genders.

The results are significant enough to warrant a change in behavior, Green said. “What we recommend is lowering fluoride ingestion during pregnancy,” she said. 

They complain that:

It’s all but certain that anti-fluoride activists, no matter how outlandish their ideas, will seize on the new study results as proof they were right all along. The findings also pose a conundrum for health-care providers and their pregnant patients.

Perhaps the fact that the “authorities” have been wrong all along has something to do with people who disagree with them being right? Nope, the correct kooks are still kooks and they always will be. Just like everyone who opposed invading Iraq or disbelieved in Russia Russia Russia-gate:

In fact, fluoride has been a boogeyman in conspiracy circles for decades. When water fluoridation became widespread in the U.S. in the 1950s, some claimed it was a Soviet plot to physically and mentally weaken Americans. The far-right John Birch Society, among others, accused the U.S. government using fluoride to usher in socialism—a conspiracy theory famously satirized in Stanley Kubrick’s 1964 film Doctor Strangelove.

Some modern conspiracy theorists have claimed fluoridated water is a form of mind control, while others falsely link it to Adolf Hitler. Some allege a corporate conspiracy: They think the dentistry industry or food companies are fluoridating water for their own purposes.

Actually, what the kooks said all along was that it lowers intelligence. What a bunch of idiots and morons, right?