Physician, writer and full-time advocate, David Wallinga, M.D., represents the Institute for Agriculture and Trade Policy (IATP) as a de facto doctor to the nation's ailing food system. Through his work, Dr. Wallinga sheds a spotlight—and a public health lens—on the less savory side of the food system, like mercury in high fructose corn syrup, or arsenic being fed to chickens and turkeys.