As more research suggests some degree of dietary cholesterol is harmless, if not healthy, the egg's reputation is slowly returning. Yet some experts worry the science is being misinterpreted and spun.
Kelly Jo Smart/NPR
Cage-free chickens in a barn near Hershey, Pa., get to roam and perch on steel rods, but they don't go outside. This week, McDonald's became the latest big buyer to demand cage-free eggs.