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Adam Drewnowski, an epidemiologist at the University of Washington, has spent his career showing that Americans’ food choices correlate to social class. He argues that the most nutritious diet—lots of fruits and vegetables, lean meats, fish, and grains—is beyond the reach of the poorest Americans, and it is economic elitism for nutritionists to uphold it as an ideal without broadly addressing issues of affordability. Lower-income families don’t subsist on junk food and fast food because they lack nutritional education, as some have argued. And though many poor neighborhoods are, indeed, food deserts—meaning that the people who live there don’t have access to a well-stocked supermarket—many are not. Lower-income families choose sugary, fat, and processed foods because they’re cheaper—and because they taste good. In a paper published last spring, Drewnowski showed how the prices of specific foods changed between 2004 and 2008 based on data from Seattle-area supermarkets. While food prices overall rose about 25 percent, the most nutritious foods (red peppers, raw oysters, spinach, mustard greens, romaine lettuce) rose 29 percent, while the least nutritious foods (white sugar, hard candy, jelly beans, and cola) rose just 16 percent. “In America,” Drewnowski wrote in an e-mail, “food has become the premier marker of social distinctions, that is to say—social class. It used to be clothing and fashion, but no longer, now that ‘luxury’ has become affordable and available to all.” He points to an article in The New York Times, written by Pollan, which describes a meal element by element, including “a basket of morels and porcini gathered near Mount Shasta.” “Pollan,” writes Drewnowski, “is drawing a picture of class privilege that is as acute as anything written by Edith Wharton or Henry James.
