[garrettdc]

It does a good enough job at modeling reality that we can make decent predictions with it. While the details of CICO may be more complicated, for someone who is obviously out of shape, the advice of "Eat some extra protein and make sure you are consuming below maintenance calories" works 9/10 times.

[WorldMaker]

Which is why Weight Watchers and Jenny Craig have never changed their formulas, always works for everyone, never have repeat customers, and are nearly broke charities, right?~

[tacon]

Those companies are a nicely disguised cover to maintain one's status quo. An online marketer once pointed out a Jenny Craig(?) advertisement: "Eat all the food you want!" Busted.