Historically, malnutrition was a problem of lack of adequate food intake and so a lack of sufficient nutrients, as the word itself implies. But in more recent times, a situation has emerged which ties malnutrition both with a lack of food and with an overabundance of food that is nutritionally lacking, or empty calories. For more insights on this fascinating paradox and how we got to this point, read on as Kristin Wartman explains the situation further in her article: The Obesity Paradox: Overfed But Undernourished. Also addressed are the questions: are all calories ‘created equal’? What is the relationship between nutrient density and caloric value?