President-elect Donald Trump announced Thursday that he planned to nominate Robert F. Kennedy Jr. to lead the Department of Health and Human Services.

With President-elect Donald Trump in the White House, the 21st century may be another story. Robert F. Kennedy Jr., whom Trump has pledged to let “go wild” on public health under his administration, is an outspoken opponent of adding fluoride to drinking water. He intends to take action.

The Winter Haven City Commission voted Tuesday to stop adding fluoride to drinking water after a lengthy public comment period where residents shared health concerns.

Kennedy Jr. has previously said that if Republican President-elect Donald Trump won the White House, the administration would advise water systems in the United States to remove fluoride. This is despite experts and officials saying the mineral is both safe and beneficial to people’s dental health.

For years, local water authorities have considered the addition of low concentrations of fluoride to drinking water a public health achievement. The Centers for Disease Control and Prevention recommends it, citing evidence showing that fluoride prevents cavities in children — the No. 1 chronic disease in kids.

Robert F. Kennedy Jr.’s goal of removing fluoride from the water supply faces challenges regardless of what role he plays on health care in the new Trump administration. Days before President-elect Trump’s election,

The CDC calls the practice of adding fluoride to tap water systems one of the 10 greatest public health achievements of the last century.