
First, Pollan investigates the idea behind nutritionism. Science, over the last few decades, has been trying to identify the nutrients in food, and now a food is described in terms of the nutrients it contains. But this is a dangerous way to describe food for several reasons. "When the emphasis is on quantifying the nutrients contained in food (or, to be precise, the recognized nutrients in foods), any qualitative distinction between whole foods and processed foods is apt to disappear," Pollan argues. With our focus on nutrients rather than foods, some processed foods (which Pollan calls "edible foodlike substances") can look even more healthy than natural foods. "It's a whole lot easier to slap a health claim on a box of sugary cereal than on a raw potato or a carrot, with the perverse result that the most healthful foods in the supermarket sit there quietly in the produce section, silent as stroke victims, while a few aisles over in Cereal the Cocoa Puffs and Lucky Charms are screaming their newfound 'whole-grain goodness' to the rafters."