Hi ac-clean,
a lot of people blame B&P shakes for constipation - I've read some posts, the only thing I know is that you had to drink extra water with them.
The way Master-Cleanse book is written, 1-st - OJ, then some veggie soup, then you add some cooked veggies, then raw salad, then some nuts and seeds, then some fish, then chicken... read it again; he isn't a writer, but you'll find it...

So, did you start having them?