Conventional nutritionists play into the hands of Big Sugar when they argue that the only thing that matters is how much we eat (and not what we eat) says Gary Taubes:
To the sugar industry, the nutritionists’ dogmatic belief that obesity is a calorie overconsumption problem and a calorie is a calorie has been the gift that keeps on giving. So long as nutrition and obesity authorities insist that this is true, then the sugar industry can rightfully defend its product on the basis that the calories from sugar are no better nor worse than those from steak or grapefruit or ice cream — perhaps even kale or quinoa. We can’t have it both ways.
– Gary Taubes