" By specifying energy or caloric content as the instrument through which foods influence body weight, it implies that a calorie of sugar would be no more or less capable of causing obesity, and thus diabetes, than a calorie of broccoli or olive oil or eggs or any other food. By the 1960s, the phrase “a calorie is a calorie” had become a mantra of the nutrition-and-obesity research community, and it was invoked to make just this argument (as it still is). "

― Gary Taubes , The Case Against Sugar