@sjd01: ZERO grams of fat? Really? None at all? That sounds horribly dangerous. You need fat in your diet, maybe not a lot, but something. As far as potassium goes, not enough terrible but too much can be just as bad.
You have to do what works for you and keeps you sane throughout. There's no point in being miserable while you lose weight because it won't last. For me, low carb works the best but "your mileage may vary."