I take CleanseMore from Renew Life every evening after dinner. Its primary ingredient is triphala. The P&B shakes also constipate me. However, if I take the CleanseMore with triphala at dinner, then the P&B right before bedtime, I have no problem the next morning going to the bathroom.
If I just take the P&B and no CleanseMore, then I do not have a bm that next day.
I have been doing this since January with no problems.