Dr. Colbert's book helps you lose weight without starving yourself, feeling hungry, or losing energy by following a high fat, low carb, and moderate protein diet. Following the Keto Zone diet will help you burn fat, balance appetite hormones, lose weight, and reverse or prevent many diseases! I have found the ideas in this book do work and have begun to lose weight using some of the recipes. Cutting back my sugar and carbs has proved to be very beneficial thanks to Dr. Colbert's book.