Most Americans have been on a diet at some point in their lives. Even if they're not overweight--it's hard to resist the temptation to look like the hottest celebrity whether they're on the low-carb, no-carb or cabbage soup diet. We're bombarded with advertisements touting the benefits of the latest dietary craze. If you're on a diet now, you're not alone. But I'm going to fill you in on a little secret that...