Book excerpt: These include Nobel Prize-winner Eli Metchnikoff, who advised that yogurt would enable people to live to be 140, and Elmer McCollum, the "discoverer" of vitamins, who tailored his warnings about vitamin deficiencies to suit the food producers who funded him. Levenstein also highlights how large food companies have taken advantage of these concerns by marketing their products to combat the fear of the moment. Such examples include the co-opting of the "natural foods" movement, which grew out of the belief that inhabitants of a remote Himalayan Shangri-la enjoyed remarkable health by avoiding the very kinds of processed food these corporations produced, and the physiologist Ancel Keys, originator of the Mediterranean Diet, who provided the basis for a powerful coalition of scientists, doctors, food producers, and others to convince Americans that high-fat foods were deadly.