Consumers want good-tasting, affordable and convenient food, but they also want to be healthy. As a deluge of front-page stories criticize food companies, the food industry is talking about a lack of trust. "There's a step change going on right now," says Ray Goldberg, professor of agriculture and business at the Harvard Business School. "Never before have so many tools been available to improve nutrition and food economics. But never before has there been so much concern."

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