Got a weakness for chocolate chip cookies? Kettle chips? Pizza? Ira talks with former FDA commissioner David Kessler about how tasty foods change your brain, and how the food industry designs the fat, salt, and sugar-laden snacks you crave. Kessler, the former head of the FDA during the Bush and Clinton administrations, is the author of the new book "The End of Overeating: Taking Control of the Insatiable American Appetite." Is overeating a lack of willpower, or a disease?
Produced by Christopher Intagliata, Senior Producer