The recommended intake of dietary fiber is 25 to 30 grams per day. The average American adult consumes only 10 to 12 grams of fiber each day. Many consume a diet high in animal and processed foods that contain little or no fiber.
High fiber diets not only promote bowel regularity, they also reduce our risk of breast and colon cancer. Fiber also helps to reduce cholesterol and blood glucose levels.
Some intestinal disorders require low fiber diets during acute flare-ups. These include:
intestinal inflammation
Crohn's disease
diverticulitis
For these disorders, a low fiber diet is followed only for a short time as advised by a healthcare provider. A high fiber diet is normally resumed once the acute symptoms have subsided.
Fresh fruits and vegetables are excellent sources of fiber as are whole grain breads, cereals, brown rice, and beans.
| Amount of fiber in some foods | Food | Portion | Fiber |
| Apple, raw | 1 medium | 3.3 grams |
| Peach, raw | 1 medium | 1.5 grams |
| Orange | 1 small | 2.9 grams |
| Mango | 1/2 small | 2.9 grams |
| Pear, raw | 1 medium | 5.1 grams |
| Fig, dried | 1 medium | 2.4 grams |
| Prunes, raw | 2 medium | 2.0 grams |
| Rasberries, raw | 1/2 cup | 4.6 grams |
| Tangerine, raw | 1 medium | 1.9 grams |
| Banana, raw | 1 medium | 3.2 grams |
| Broccoli, fresh, cooked | 1/2 cup | 3.2 grams |
| Brussel sprouts, cooked | 1/2 cup | 2.3 grams |
| Carrot, cooked | 1/2 cup | 2.3 grams |
| Green beans, cooked | 1/2 cup | 2.8 grams |
| Cauliflower, cooked | 1/2 cup | 1.7 grams |
| Spinach, cooked | 1/2 cup | 2.2 grams |
| Tomato, raw | 1 medium | 2.0 grams |
| Summer squash, cooked | 1 cup | 2.5 grams |
| Winter squash, cooked | 1 cup | 5.7 grams |
| Peas, cooked | 1/2 cup | 4.2 grams |
| Corn on the cob, cooked | 1 medium | 5.9 grams |
| Potato, cooked | 1 medium | 2.3 grams |
| Lima beans, cooked | 1/2 cup | 6.6 grams |
| Baked beans, cooked | 1/2 cup | 8.0 grams |
| Walnuts | 2 whole | 0.3 grams |
| Brown rice, cooked | 1 cup | 3.5 grams |
| White rice, cooked | 1 cup | 0.6 grams |
| Bread, whole wheat | 1 slice | 2.1 grams |
| Bread, white | 1 slice | 0.8 grams |
| Fiber One cereal | 1/2 cup | 14.0 grams |
| Raisin bran cereal | 1/2 cup | 3.5 grams |
| Cheerios | 1/2 cup | 2.0 grams |
| Cap'N Crunch | 1/2 cup | 0.67 grams |
| Special K | 1/2 cup | 0.67 grams |
| Fruit Loops | 1/2 cup | 0.5 grams |
| Crispix | 1/2 cup | 0.5 grams |