I am sorry I don't have an answer. I have however been experiencing constipation for years and my nutritionist has offered me a few solutions. Firstly I take cascara capsules every day or every second day and they make me go but not violently like epsons do.
I also do a few different protocols. The one that helps me a lot is each day in my yogurt I put a teaspoon of the following recipe in:-
I take a mix of butter (1 block) with probiotics - 1 teaspoon, colostrum - 1 teaspoon, glutamine - 1g and some honey (maybe 1 teaspoon or more for taste). I blend these up and keep in the fridge and do not microwave at any point as it ruins it.
Must be raw honey though not the crap you buy at the shops.
When I take that my entire digestive feels good and it helps elimination.