Objective Proficiency p 120. Why Calories Count. Extra Listening

One in three adults in the U.S. is obese, and that doesn't account for the simply overweight. But many people still don't know what's actually making people fat. Is overeating to blame? Calorie counting gone awry? Too many carbohydrates? KQED Forum talks with nutrition and food expert Marion Nestle about her new book, "Why Calories Count: From Science to Politics."

Listen to the programme on the Forum website