Screen time and junk food offer dopamine hits — and our kids are not immune. Michaeleen Doucleff reports on children’s health for NPR’s science desk, and she joins guest host Courtney Collins to discuss misconceptions about dopamine, why it’s making kids lonely and anxious, and ways to introduce healthier habits into your family’s lifestyle. Her book is “Dopamine Kids: A Science-Based Plan to Rewire Your Child’s Brain and Take Back Your Family in the Age of Screens and Ultraprocessed Foods.”