Should sugar be regulated like tobacco and alcohol? Obesity researcher ROBERT LUSTIG thinks so because it’s a toxic substance. Lustig researches the health effects of sugar and believes that our sweet habit plays a leading role in chronic disease and premature death. And it’s hard to avoid sugar in our society – it’s everywhere from pasta sauces to bread to salad dressing. Today we’ll talk with Lustig, a pediatrician at University of California, San Francisco, about what sugar does to our bodies and if the government has a role in limiting our access to it.