M.C.
I have done dietary cleanses and actual colon irrigation. I agree with another poster that you have to change your diet - you can't just do one cleanse and be fine. That said, I think doing a cleanse is a great way to start out on a new eating path that is good for the gut (like the Weston Price diet, with lots of raw/fermented foods, healthy fats, etc). Some people need a gut healing diet like Body Ecology Diet or Specific Carbohydrate diet to kick start things.