Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Complete quackery

I read through about 1/3 of this book several years ago when I finally decided that it was complete quackery. For example, the main theme of the book is that different foods will produce either "acidic" or "alkaline" digestive juices. Where are they getting this from? Enzymes digest food, aided somewhat by an HCl solution in the stomach. I don't know where they came up with the "alkaline digestive juices" idea--presumably they just made it up. Further nonsense about "live atoms" vs. "dead atoms" convinced me that the authors have absolutely no idea what they're talking about. Just Say No.