Sugar appears to have no nutritional value. But is it more than just empty calories? Is it actually bad for us? Author and journalist Gary Taubes talks with EconTalk host Russ Roberts about his latest book, The Case Against Sugar. Taubes argues that there is substantial circumstantial evidence suggesting that sugar is the underlying cause of a host of modern health problems including diabetes, heart disease, and obesity. Taubes concedes the evidence is not iron-clad or definitive and reflects along the way on the intellectual and personal challenges of holding a strong view in the face of significant skepticism.