MYTH: Calories are the most important part of the diet, that the sources of those calories don’t matter. When it comes to your body, things are not that simple. The human body is a highly complex biochemical system with elaborate processes that regulate energy balance. Different foods go through different biochemical pathways, some of which are inefficient and cause energy (calories) to be lost as heat. Even more important is the fact that different foods and macronutrients have a major effect on the hormones and brain centers that control hunger and eating behavior. The foods we eat can have a huge impact on the biological processes that govern when, what and how…