Health Secretary Robert F. Kennedy Jr. has declared his intention to order the CDC to halt its nationwide push for fluoride in drinking water, a bold move announced on Monday that could reshape public health policy. He’s gearing up to assemble a task force to tackle the issue head-on, signaling a major shift away from decades of fluoridation advocacy.

Speaking to The Associated Press after a Salt Lake City news conference, Kennedy outlined his directive, which coincides with the Environmental Protection Agency’s Monday announcement that it’s reviewing fresh scientific data on fluoride’s potential health risks. This dual action underscores growing scrutiny over a practice long touted as a dental health triumph, now facing a reckoning under Kennedy’s leadership.

Nbcnews.com reports: Utah last month became the first state to ban fluoride in public drinking water, pushing past opposition from dentists and national health organizations who warned the move would lead to medical problems that disproportionately affect low-income communities.

Republican Gov. Spencer Cox signed legislation barring cities and communities from deciding whether to add the cavity-preventing mineral to their water systems. Water systems across the state must shut down their fluoridation systems by May 7.

Kennedy praised Utah for emerging as “the leader in making America healthy again.” He was flanked by Utah legislative leaders and the sponsor of the state’s fluoride law. “I’m very, very proud of this state for being the first state to ban it, and I hope many more will,” he said.

EPA Administrator Lee Zeldin, who appeared with Kennedy at the news conference, said his agency was launching a renewed examination of scientific studies on the potential health risks of fluoride in drinking water to help inform any changes to the national standards.

“When this evaluation is completed, we will have an updated foundational scientific evaluation that will inform the agency’s future steps,” Zeldin said. “Secretary Kennedy has long been at the forefront of this issue. His advocacy was instrumental in our decision to review fluoride exposure risks and we are committed to working alongside him, utilizing sound science as we advance our mission of protecting human health and the environment.”

Fluoride strengthens teeth and reduces cavities by replacing minerals lost during normal wear and tear, according to the CDC. In 1950, federal officials endorsed water fluoridation to prevent tooth decay, and in 1962 set guidelines for how much should be added to water.

Kennedy, a former environmental lawyer, has called fluoride a “dangerous neurotoxin” and said also it’s been associated with arthritis, bone breaks, and thyroid disease. Some studies have suggested such links might exist, usually at higher-than-recommended fluoride levels, though some reviewers have questioned the quality of available evidence and said no definitive conclusions can be drawn.

Fluoride can come from a number of sources, but drinking water is the main one for Americans, researchers say. Nearly two-thirds of the U.S. population gets fluoridated drinking water, according to CDC data. The addition of low levels of fluoride to drinking water was long considered one of the greatest public health achievements of the last century.

About one-third of community water systems — 17,000 out of 51,000 across the U.S. — serving more than 60% of the population fluoridated their water, according to a 2022 CDC analysis. The agency currently recommends 0.7 milligrams of fluoride per liter of water.

But over time, studies have documented potential problems. Too much fluoride has been associated with streaking or spots on teeth. Studies also have traced a link between excess fluoride and brain development.

A report last year by the federal government’s National Toxicology Program, which summarized studies conducted in Canada, China, India, Iran, Pakistan and Mexico, concluded that drinking water with more than 1.5 milligrams of fluoride per liter — more than twice the recommended level in the U.S. — was associated with lower IQs in kids.