This book actually isn't as quacky as it sounds. It is like the South Beach Diet in that it helps regulate blood sugar to eliminate unhealthy cravings--in five days. It won't zap all of your weight overnight but definitely will eliminate the cravings in a short time period- and that is half the battle.
I can tell you for certain that from my experience with the book, this eliminated food cravings. I do think the author is on to something here. Whether or not one loses weight is one thing but if you want to learn more about eliminating cravings and keeping energy up (stabilizing blood sugar), this is worth a read; her strategies really do work and they don't require purchasing a line of products. She's realistic and this is completely applicable today. And healthy - did I mention that??