President Trump’s pick to lead the Department of Health and Human Services, Robert F. Kennedy Jr., wants to “Make America Health Again.” However, investors are betting that one of his pushes will be a boon for the dental industry’s profits.

Mr. Kennedy wants to get rid of fluoride in water because he says Americans “don’t need” it in their water, and it is a “very bad way to deliver it into our systems.” He has also called fluoride an “industrial waste associated with arthritis, bone fractures, bone cancer, IQ loss, neurodevelopmental disorders, and thyroid disease.”