The "Fat Fast" was created by Dr Atkins for people who struggle losing weight while even following a low carb lifestyle. My weight loss came off fast in the beginning but now I've hit a stall and I'm ready to break it. He recommended following it for 4-5 days to kick the body back into fat burning mode to promote weight loss, curbed appetite, and give positive lipolysis testing strips. I'm going to do it for 3-4 days and than go back to eating Induction friendly food. As stated in Dr Atkins' New Diet Revolution book: "The "Fat Fast" is a controlled carb program where you have to count calories. You eat 1000 calories a day with seventy-five to ninety percent fat." You eat 5x a day with each meal being around 200 calories. He lists some choices to eat during the "Fat Fast" in his book in Chapter 20 called Metabolic Resistance: Causes and Solutions.