" The most obvious difficulty with the notion that a retarded metabolism explains the idiosyncratic nature of fattening is that it never had any evidence to support it. Before von Noorden proposed his hypothesis, Magnus-Levy had reported that the metabolism of fat patients seemed to run as fast if not faster than anyone else’s. "

― Gary Taubes , Good Calories, Bad Calories: Challenging the Conventional Wisdom on Diet, Weight Control, and Disease