Days before the election, Kennedy posted on social media that a Trump White House would advise all U.S. water systems to remove fluoride from the public water supply, which goes against public health recommendations yet jibes with a large number of people who question the safety of fluoridating water.

The debate over fluoride in drinking water has been elevated with Robert F. Kennedy Jr.'s push to remove the chemical, alleging it does more harm than good.

A recent post on X by Robert F. Kennedy Jr. promised to remove fluoride from America's public water systems under a Trump presidency, connecting it to conditions like arthritis, IQ loss, and bone cancer.

Fluoride is missing from 43% of Californian faucets, including Bay Area towns of Los Altos, Santa Cruz, Novato and parts of Santa Clara, San Jose and Livermore.

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.

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

Kennedy, the former presidential candidate and longtime public health skeptic, made comments on X suggesting that fluoride would be banned from public water supplies under a Trump administration.

President-elect Donald Trump’s pick to lead the Health and Human Services Department is raising concerns in the dental community over his push to rid the country’s public water supply of fluoride.