Alice Callahan, a nutrition reporter for The New York Times, joins psychiatrist and nutritionist Uma Naidoo, who authored "This Is Your Brain on Food," and Laurel Bristow, a public health expert. They delve into the prevalence of ultra-processed foods, revealing how over half of American calories come from these often misleadingly marketed items. The trio discusses their impact on health, particularly the gut microbiome and mental well-being, while sharing tips on identifying these foods and making healthier choices to combat diet-related issues.