Purefit Keto Chances are, if you're reading this article, you've tried a number of diets already and they haven't worked for you. So why consider the South Beach Diet? After all, if you're only going to lose weight to put it back on again (or, worse yet, not lose weight at all), why struggle through the emotional and physical challenges of dieting? Well, there's one reason! The South Beach Diet isn't just a diet; it's a way to learn to change your eating so that you stay thin and healthy for the rest of your life.