U.S. Health Secretary Robert F. Kennedy Jr. on Monday said he plans to tell the Centers for Disease Control and Prevention to stop recommending fluoridation in communities nationwide. Kennedy said he’s assembling a task force of health experts to study the issue and make new recommendations.

Also on Monday, the U.S. Environmental Protection Agency announced it is reviewing “new scientific information” on potential health risks of fluoride in drinking water. The EPA sets the maximum level allowed in public water systems.

Kennedy told The Associated Press of his plans after a news conference with EPA Administrator Lee Zeldin in Salt Lake City.

Kennedy cannot order communities to stop fluoridation, but he can direct the CDC to stop recommending it and work with the EPA to change the allowed amount.

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 disproportionately hurt low-income residents who can’t afford regular dentist visits.

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

Kennedy oversees the CDC, whose recommendations are widely followed but not mandatory. State and local governments decide whether to add fluoride to water and, if so, how much — as long as it doesn’t exceed a maximum set by the EPA, which is currently 4 milligrams per liter.

Zeldin 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 they set guidelines for how much should be added to water.

Kennedy, a former environmental lawyer, has called fluoride a “dangerous neurotoxin” and said it has 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.

In November, just days before the presidential election, Kennedy declared Donald Trump would push to remove fluoride from drinking water on his first day as president. That didn’t happen, but Trump later picked Kennedy to run the U.S. Department of Health and Human Services, where he has been expected to take some kind of action. Meanwhile, some localities have gone ahead with deciding whether to keep adding fluoride.