I also suffered constipation so I will share what worked for me
I drink lots of water
I tone my bowels by doing sit ups
Got allergy tests, stopped eatting food allergic too alot better but still had problems.
Went to acupuncture, great also,
I take isogel, metamucil and other products didn't work for me.
I can now say I don't have problems, and if you try all of the above and don't get cured, I would suggest that you get a specialist to check it out, could be something more serious going on.
Hope this helps