In the long run fiber seems to do a lot of damage to the gut, even to the microflora, according to gutsense.org . The best laxative seems to be Vitamin C because of no side effects. That's 2,000 to 4,000 mg per day to start with. L-Glutamine helps restore the mucosa. Minimizing fiber & carbs is said to restore health. I just started on this a few days ago. But fiber hasn't helped me much for the past 5 years or more. So gutsense makes sense to me.