Is sugar toxic? According to journalist Gary Taubes, yes. Madeleine spoke to him about his cover article for the New York Times Magazine. He says sugar is not just behind obesity and tooth decay, it may be the cause of cancer and heart disease.
You can read the original article for a more in depth explanation.
Here's a link to the original segment.
Taubes is also the author of Why We Get Fat: And What to Do About It and Good Calories, Bad Calories: Fats, Carbs and the Controversial Science of Diet and Health.