Fiber is essential for good colon health. If you frequently experience constipation, it could be that you need to drink a lot more water and include more high-fiber foods in your diet. It is an established fact that fiber plays an important role in disease prevention. Fiber moves food through your colon faster than it would go otherwise, reducing and preventing build-up, blockages, and reabsorption of toxins through the colon walls. Decreased transit time is an important factor in preventing diverticulitis, hemerrhoids, and constipation.
Soluble fiber reduces cholesterol.
One source recommends 35 grams of fiber daily.