Nutrient density refers to the amount of nutrients present in a given food or meal, relative to its caloric content. In other words, it's an indicator of how much nutrition you are getting per calorie consumed. Foods with high nutrient density provide more vitamins, minerals, and other essential nutrients compared to the number of calories they contain, while foods with low nutrient density offer fewer nutrients relative to their caloric value. A diet rich in nutrient-dense foods can help ensure that you are getting all the necessary vitamins and minerals your body needs for optimal health without consuming excessive amounts of empty calories.