And some information that I took with a grain of salt...
I am a big fan of Wheatgrass Juice. I take a double shot daily and have found it gives me increased vitality and just a general boost. This is the best source of information of the nutritional benefits of the the juice.
I am not a big fan of the colonics or fasting which this book also touts as beneficial. That is a difference of opinion. However, Dr. Wigmore gives a very evenhanded description of how the fasting is done, how the fasting may be modified and no dire consequences if you just can't do it. It is the same with the colonics. She explains it all and then very understandingly states, you don't have to do it. It isn't for everyone.
My skeptical boyfriend (committed carnivore and diet coke drinker) has read the book also (it was in the bathroom...). He went of his own violition to have a double shot before his flight to Vegas. Victory!