>> Conservation of energy still applies. Of course, but in this case we can only measure energy intake, and only semi-accurately (not everybody metabolizes ev

>> Conservation of energy still applies. Of course, but in this case we can only measure energy intake, and only semi-accurately (not everybody metabolizes every food 100% efficiently). The body is known for up-regulating and down-regulating energy expenditure based on a wide variety of factors, especially blood sugar level. So what you eat matters as much as how much you eat.