How important is fluoride for preventing cavities? And is it safe for us and our kids? Dr. Frank Zelko joins the show to tackle these questions. Dr. Zelko is a professor at the University of Hawaii and has a PhD in environmental history. He is currently working on a book about the history of water fluoridation and the latest research regarding its efficacy and health effects. Expect to go on a fascinating historical journey, and learn about the latest science so you can make your own decision about your drinking water. You can learn more about Dr. Zelko at manoa.hawaii.edu