I agree with so many other reviewers here. Theres no real new info presented. And the PGX--poyglycoplex--they want you to buy from Natural Factors? Nothing more than a fancy schmancy name for KONJAC/GLUCOMMANAN which can be found less expensively all over the internet.
Here's what Dr. Weil said about Konjac 6 years ago:
Konjac fiber is a starch from the root of the konjac plant (Amorphophallus konjac) that grows in China and Japan. The popular name for the root in Japan is devil's tongue or konnyaku, and it is prepared there into foods that look like squares or strips of stiff gelatin, with a rubbery texture. The Japanese regard konjac as a health food, especially good for intestinal function.
The main component of the konjac root is glucomannan, a water-soluble dietary fiber consisting of mannose and glucose sugars. ...Some countries... have banned a number of weight-loss products containing glucomannan, which were found to cause choking when caught in the throat.
If you're interested in konjac fiber, try some of the traditional Japanese foods such as shirataki noodles or konnyaku. "
The fact that this book is one long advertisement for an expensive and particular "weight loss" supplement bothers me. The fact that this one expensive and particular weight loss supplement is easily found less expensively but covered up by the fancy shcmancy term PGX or polyglycoplex bothers me even more.
We all know what foods are most healthful to eat, so there's nothing new in the book there. We all know about the glycemic index, so there's nothing new there. We all know that satiety and appetite have so much to do with eating, but the jury is still out as to whether konjac is the end all and be all for everyone.
The book is worth a glance or two, and you may even want to give the suggested product a try, or a similar less expensive one, such as a Glucomannan supplement, WHICH IS THE SAME THING AS PGX only a LOT less expensive!
"Glucomannan is a gentle and effective natural fiber that promotes healthy colon function. Derived from the konjac root, glucomannan is a water-soluble dietary fiber considered to be a 'bulk-forming laxative.' Glucomannan may also promote healthier cholesterol and support healthy blood sugar levels."
Do a little internet research on PGX/konjac/glucomannan and see if you think it's worth a try. But don't believe all the hype, and look beyond the single and highly expensive supplement they focus on solely in this book. There are other less expensive options if you think you'd like to give it a try.
The reason this books only gets one star from me is because the authors purposely mislead the public into believing that ONLY their product, PGX aka WellBetX by Natural Factors is the ONLY product with konjac fiber. Any author who purposely misleads people in that manner are selling a book that is nothing more than an advertisement for a single product. Had the authors mentioned that PGX is also known as konjac, glucomannan, etc., their book would've scored an additional star or two or even three. Purposefully misleading folks is not honest.