America’s public health could be at risk if the incoming administration doesn’t correct some of the campaign rhetoric that may have helped Donald Trump win an election but has no merit now that voting is over.

For example, inaccurate comments about water fluoridation that prospective U.S. Department of Health and Human Services secretary Robert F. Kennedy Jr. has not taken back.

“Fluoride is an industrial waste associated with arthritis, bone fractures, bone cancer, IQ loss, neurodevelopmental disorders, and thyroid disease,” Kennedy said in a November social media post in which he also claimed the president-elect would advise all U.S. water systems to remove fluoride from public water.

As is typical with Trump, he has neither embraced nor denied Kennedy’s assertions, preferring to instead suggest support of ideas that he may later reject by nebulously saying of Kennedy: “I’m going to let him go wild on health. I’m going to let him go wild on the food. I’m going to let him go wild on medicines.”

Please, don’t.

America doesn’t need anyone “wild” in charge of public health. Kennedy can’t be taken seriously when he makes misleading comments about water fluoridation that may have a veneer of truth but don’t hold up when someone takes the time to review the facts.

Fluoride is not an industrial waste product. It is a mineral found in rocks and soil that leaches naturally into streams and other water supplies. Its effectiveness in preventing tooth decay was discovered in the 1920s when it was observed that Colorado Springs, Colo., residents whose teeth were stained by excessive fluoride in their water sources had fewer than normal cavities.

Kennedy is wrong to suggest the subsequent fluoridation of community water supplies across America occurred hastily and without due investigation of potential dangers. The National Institutes of Health began investigating how fluoride affects the human body in the 1930s, but the first major trial of fluoridation of a community’s water supply didn’t occur until 1945 in Grand Rapids, Mich.

President Harry S. Truman signed an act creating the National Institute of Dental Research in 1948 in large part because 20% of young men being drafted for military service were rejected because their teeth were so bad. Meanwhile, 10 years after the Michigan study began, the cavity rate among Grand Rapids children was reduced by more than 60%.

Subsequent research shows drinking fluoridated water not only reduces cavities and associated dental pain but correspondingly cuts missed school and work days. Such results prompted cities and towns across America — including Philadelphia — to begin fluoridating their water, so much so that by 2010 the tap water of more than 200 million Americans was flowing from fluoridated systems.

There have been virtually zero instances in which putting fluoride in a water system has been blamed for a public health issue since the fluoridation of most of America’s water supplies began. In fact, the Centers for Disease Control and Prevention has ranked water fluoridation as one of the 10 greatest public health achievements of the 20th century.

Kennedy is trying to solve a problem that doesn’t seem to exist.

The National Institutes of Health did complete a study that concluded there might be a connection between the lower IQs of children after long-term exposure to more than twice the federal government’s recommended level of fluoride in drinking water. But why would any town knowingly exceed the government’s fluoridation guidelines by such a large margin? There’s no incentive for local officials to risk their children’s or adults’ health.

Kennedy also says fluoridating water systems is no longer necessary. “Fluoride made sense in the 1940s when they put it in, but now we have fluoride in toothpaste,” he said. That’s true, fluoride today is in toothpaste, mouthwashes, and other oral hygiene products, but that’s why the recommended level of fluoride in water supplies was reduced from 1.0 parts per million to 0.7 parts per million in 2011. Future research may lead to more reductions in recommended fluoride levels, but there’s no basis for Kennedy’s call for a ban now.

Trump’s choice to plot the course of public health agencies that make life-and-death decisions based on scientific evidence is a bad one. Kennedy comes across as someone who loves basking in the limelight too often afforded contrarians who pay little attention to facts.

In that same vein, Kennedy has criticized vaccines that have long protected millions of Americans from crippling and deadly diseases. Surely the president-elect can do better with his nominations.

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