The calories thing is wrong in the context of telling people to count them. In practice it is very hard to know exactly how many calories are coming in or goin

The calories thing is wrong in the context of telling people to count them. In practice it is very hard to know exactly how many calories are coming in or going out in real life situations. Even labeled boxed foods are often way off from their official calorie numbers, and it’s not like most people are running their poop through a crucible, or doing all their exercise in a tank of water to measure their heat output.