Author Dr. Ian K. Smith answers every dieter's biggest question: How to lose that last twenty pounds? What happens when nothing works? So Smith created a new weight loss program. Shred includes a low GI diet, meal spacing and even meal replacements. If you follow this program, you will constantly be eating. In fact, every three and a half hours. It will feature meal replacements like soups, smoothies and shakes. You are also allowed to snack.