This post was awesome. Thank you. I've often wondered whether every human uptakes calories from food in the same way. In the same vein, and at the risk of be

This post was awesome. Thank you. I've often wondered whether every human uptakes calories from food in the same way. In the same vein, and at the risk of being too graphic, is it true that all human excrement is non-caloric? That is to say, are we really uptaking all of the calories available in the food we eat?