PHOENIX (AP) — Robert F. Kennedy Jr ., a prominent proponent of debunked public health claims whom Donald Trump has promised to put in charge of health initiatives , said Saturday that Trump would push to remove fluoride from drinking water on his first day in office.

Fluoride strengthens teeth and reduces cavities by replacing minerals lost during normal wear and tear , according to the U.S. Centers for Disease Control and Prevention.

The addition of low levels of fluoride to drinking water has long been considered one of the greatest public health achievements of the last century. Kennedy made the declaration on the social media platform X alongside a variety of claims about the heath effects of fluoride. “On January 20, the Trump White House will advise all U.

S​. water systems to remove fluoride from public water,” Kennedy wrote. Trump and his wife, Melania Trump, “want to Make America Healthy Again,” he added, repeating a phrase Trump often uses and links to Kennedy.

It was not clear if Kennedy discussed Saturday’s post with Trump or his aides. The Trump campaign did not answer directly, and a spokesperson for Kennedy did not respond when asked. “While President Trump has received a variety of policy ideas, he is focused on Tuesday’s election," Danielle Alvarez, Trump campaign senior advisor, said.

But the sudden and unexpected weekend social media post evoked the chaotic policymaking that defined Trump’s White House tenure, when he would issue policy .