I thought this might be a little helpful, I got it from my mom who has an email subscription to Dr. Weil:
The human digestive system is about 30 feet long - quite a distance for food to travel. You can help keep the process running smoothly by getting regular exercise, eating a diet rich in fiber, fruits and vegetables, and drinking plenty of water. If you suffer from digestive difficulties, you can further help your digestive system by experimenting with natural digestive remedies. Common ones include deglycyrrhizinated licorice (DGL), slippery elm, fish oil, probiotics, psyllium, marshmallow root, and triphala. Reliable, condition-specific information about which remedy to use is available on DrWeil.com, and your local health food store should carry most of these remedies - try one appropriate remedy at a time to see which one works best for you.