Americans are among the world’s biggest consumers of ultra-processed foods, making up more than half of the average adult’s diet and two-thirds of the average child’s. As technology continues to accelerate innovations in additives, chemicals and food products, U.S. regulators are struggling to keep up. CBS Reports examines why ultra-processed foods have become so ubiquitous in the American diet and what closing gaps in federal regulation can do to ensure Americans are nourished and healthy.