A recent study by Yancy et al shows that going on a low fat calorie restricted diet in combination with the shady orlistat drug results in the same weight loss as a low carbohydrate diet over a 48 week period.
In other words, go on a low fat hunger inducing diet with no scientific merit for long time success and spend your money on drugs. Or, eat what you want when you want as long as you keep carbohydrate intake at a minimum. Oh, and did I mention the low carbohydrate diet results in an overall larger reduction in cardiovascular risk factors?
The study her:
Jimmy More elaborates here: