Dried prunes. According to the query good doctor website shows that dried prunes are more rich in dietary fiber and natural pectin than prune juice, these ingredients can increase the water content in the intestinal tract, promote intestinal peristalsis, thus relieving constipation problems. So dried prunes are more laxative and good. Dried prunes are rich in vitamin A and fiber, both iron, potassium and other minerals, fat-free, cholesterol.