I'm guessing he's referring to Gary Taubes and the book, Good Calories, Bad Calories. It was a big thing years ago, and I would have also assumed most people kn

I'm guessing he's referring to Gary Taubes and the book, Good Calories, Bad Calories. It was a big thing years ago, and I would have also assumed most people knew about it. One of the basic ideas is that calories in - calories out = fat is an oversimplification and ignores the complexities of the way our bodies process different foods. In other words, the argument isn't trying to break the laws of physics, it's just arguing where the energy is actually going in your equation. The book itself is lengthy and comprehensive. He cites a lot of research to make his case, and the citations are available in the book. With that said, I don't think calories in - calories out is wildly inaccurate, and I don't believe Taubes makes that case.