I mean, sure. Not every single calorie you consumed gets absorbed and expelled. Fiber has tons of calories, but our bodies cant digest it so its simply expelled. Its very naunce argument. Thats why i selectively said "enegry dense food" sugars and fats are easily broken down and absorbed. I was not intending you to interpret it as meaning if you eat a gram of uranium, that your body would suddenly gain 18 million calories.