Robert Lustig is a medical expert at the University of California, San Francisco, who has written extensively about the major health problems attributed to sugar. He’s written two major papers — “Fructose: it’s ‘alcohol without the buzz'” and “The toxic truth about sugar” — laying out the case for treating sugar like a controlled substance, similar to alcohol and tobacco. I spoke with Lustig on the phone on June 2014 about the issue. This interview has been edited for length and clarity. […]