Considering going on a diet? If so, you should be aware that most diets don’t work. After all, this probably isn’t your first diet. It’s important that you know that you are not the “problem” with any one particular diet. The problem is that they are one-size-fits-all and often unsustainable. Certain diets are proven to bring quick weight-loss for just about anyone who tries them – but most people put the weight right back on.