Florida on Thursday became the second U.S. state to prohibit fluoride, a mineral used for decades to protect teeth from decay, in its water systems. The move is part of a broader push by U.S. Department of Health and Human Services Secretary Robert F.

Gov. Ron DeSantis of Florida signed a bill into law on Thursday that bans the addition of fluoride to public water supplies, making Florida the second state to prohibit the widespread public health practice.

With the stroke of a blue Sharpie, Gov. Ron DeSantis signed this year's "Florida Farm Bill," which among other things makes it against the law to fluoridate municipal water supplies.