"No matter what the diet, the key to weight loss is to burn more calories than are taken in. Fats contain more than twice as many calories per gram as proteins

"No matter what the diet, the key to weight loss is to burn more calories than are taken in. Fats contain more than twice as many calories per gram as proteins or carbohydrates. It seemed logical, then, to reduce fat as a means of reducing calories overall, says Hall." Translation: we were wrong, but it was logical to be wrong and we still have some other ways to be wrong, like the "all calories are equal" mantra to replace old wrongs that we can't say anymore with a straight face.