Read a few pages of this book online before you buy it. He may have something brilliant to say, but he says it horribly. Believe it or not there is a reason for this very difficult to read prose. Do a google on _why academic writing is so bad_ to learn more.
I got severe stomach cramps from using this. I will never use it again. If you do a google on "culturelle cramps" you will find lots of other people who had the same problem. I have used other probiotics and have not had this problem.