Top 13 Fiber-Rich Foods
One of the most impactful changes you can make on your health is to boost your fiber, but how can you increase your fiber intake? This list of top 13 fiber-rich foods will get you started.
Many areas of nutrition tend to elicit controversy, but dietary fiber is usually not one of them. Scientific evidence links fiber intake to a plethora of health benefits, including treating and preventing constipation, hemorrhoids, and diverticulosis; decreasing blood cholesterol levels, which protects against certain forms of cancer; and increasing satiety to help control weight.
There are a number of health benefits for fiber. The most promising benefit that is receiving more and more attention is fiber’s role in immune health. We know that cardiovascular disease, diabetes, and obesity have underlying inflammatory processes. Dietary fiber may play a role to modulate the immune system and therefore produce a decreased risk of cardiovascular disease, diabetes, cancer, and obesity. There is wonderful, intriguing work going on in this area now, says Roger A. Clemens, DrPH, CNS, FACN, FIFT, a professor in the regulatory science program in the School of Pharmacy at the University of Southern California and a volunteer scientific spokesperson for the Institute of Food Technologists with more than 30 years of experience in the field.
Consumers are cued into fiber’s health benefits. According to an International Food Information Council survey, 86% of consumers linked fiber with a healthy digestive system and 73% associated whole grains with heart disease prevention. While people seem to have interest in fiber, the real challenge is getting enough. And people complain a lot about flatulence. For most, the frequent gastric distress will go away, reports Clemens. The Institute of Medicine recommends dietary fiber intake for adults aged 50 and younger of 38 grams for men and 25 grams for women, and for men and women older than 50, an intake of 30 and 21 grams, respectively. But Americans are falling seriously short of the recommended goal, with an average intake of about 15 grams per day.
Many whole plant foods are rich in different types of dietary fiber, such as pectin, gum, mucilage, cellulose, hemicellulose, lignin, and soluble fiber. Consuming a variety of fibers is suggested to gain the maximum benefits of a high-fiber diet. Clemens also believes that the future for raising the fiber intake of Americans may be through food science advancements. “I think the future for fiber will involve alternative sources of dietary fiber from tree bark, algae, seaweed, and various kinds and parts of vegetables not previously considered edible, such as peels of fruits and vegetables. With today’s food science and emerging technologies, food manufacturers are putting dietary fiber into almost any kind of food, such as chocolate, powdered beverages, and infant formula,” he says.
In recognition of fiber’s benefits, I’m looking at some of the best ways to boost fiber intake, from whole to fortified foods, using data from the USDA National Nutrient Database for Standard Reference. Here are the top fiber rich foods to include in your diet.
Top 13 Fiber-Rich Foods
1. Get on the Bran Wagon. One simple way to increase fiber intake is to power up on bran. Bran from many grains is very rich in dietary fiber. Oat bran is high in soluble fiber, which has been shown to lower blood cholesterol levels. Wheat, corn, and rice bran are high in insoluble fiber, which helps prevent constipation. Bran can be sprinkled into your favorite foods, from hot cereal and pancakes to muffins and cookies. Many popular high-fiber cereals and bars are also packed with bran.
| Food | Portion | Amount of Fiber |
| Oat bran, raw | 1 ounce | 12 g |
| Wheat bran, raw | 1 ounce | 12 g |
| Corn bran, raw | 1 ounce | 22 g |
| Rice bran, raw | 1 ounce | 6 g |
| Fiber One Bran Cereal | 1/2 cup | 14 g |
| All-Bran Cereal | 1/2 cup | 10 g |
| Fiber One Chewy Bars | 1 bar | 9 g |
2. Take a Trip to Bean Town. Beans really are the magical fruit. They are one of the most naturally rich sources of fiber, as well as protein, lysine, vitamins, and minerals, in the plant kingdom. It’s no wonder so many indigenous diets include a bean or two in the mix. Some people experience intestinal gas and discomfort associated with bean intake, so they may be better off slowly introducing beans into their diet. Encourage a variety of beans as an animal protein replacement in stews, side dishes, salads, soups, casseroles, and dips.
| Food | Portion | Amount of Fiber |
| Lima beans, cooked | 1 cup | 14 g |
| Adzuki beans, cooked | 1 cup | 17 g |
| Broad beans (fava), cooked | 1 cup | 9 g |
| Black beans, cooked | 1 cup | 15 g |
| Garbanzo beans, cooked | 1 cup | 12 g |
| Lentils, cooked | 1 cup | 16 g |
| Cranberry beans, cooked | 1 cup | 16 g |
| Black turtle soup beans, cooked | 1 cup | 17 g |
| Kidney beans, cooked | 1 cup | 16 g |
| Navy beans, cooked | 1 cup | 19 g |
| White beans, small, cooked | 1 cup | 19 g |
| French beans, cooked | 1 cup | 17 g |
| Mung beans, cooked | 1 cup | 15 g |
| Yellow beans, cooked | 1 cup | 18 g |
| Pinto beans, cooked | 1 cup | 15 g |
3. Go Berry Picking. Jewel-like berries are in the spotlight due to their antioxidant power, but let’s not forget about their fiber bonus. Berries happen to yield one of the best fiber-per-calorie bargains on the planet. Since berries are packed with tiny seeds, their fiber content is typically higher than that of many fruits. Enjoy berries year-round by making the most of local berries in the summer and eating frozen, preserved, and dried berries during the other seasons. Berries make great toppings for breakfast cereal, yogurt, salads, and desserts.
| Food | Portion | Amount of Fiber |
| Raspberries, raw | 1 cup | 8 g |
| Blueberries, raw | 1 cup | 4 g |
| Currants (red and white), raw | 1 cup | 5 g |
| Strawberries, raw | 1 cup | 3 g |
| Boysenberries, frozen | 1 cup | 7 g |
| Gooseberries, raw | 1 cup | 6 g |
| Loganberries, frozen | 1 cup | 8 g |
| Elderberries, raw | 1 cup | 10 g |
| Blackberries, raw | 1 cup | 8 g |
4. Wholesome Whole Grains. One of the easiest ways to up fiber intake is to focus on whole grains. A grain in nature is essentially the entire seed of the plant made up of the bran, germ, and endosperm. Refining the grain removes the germ and the bran; thus, fiber, protein, and other key nutrients are lost. The Whole Grains Council recognizes a variety of grains and defines whole grains or foods made from them as containing all the essential parts and naturally-occurring nutrients of the entire grain seed. If the grain has been processed, the food product should deliver approximately the same rich balance of nutrients that are found in the original grain seed. Choose different whole grains as features in side dishes, pilafs, salads, breads, crackers, snacks, and desserts.
| Food | Portion | Amount of Fiber |
| Amaranth, grain | 1/4 cup | 6 g |
| Barley, pearled, cooked | 1 cup | 6 g |
| Buckwheat groats, cooked | 1 cup | 5 g |
| Popcorn, air popped | 3 cups | 4 g |
| Oats (old fashioned), dry | 1/2 cup | 4 g |
| Rye flour, dry | 1/4 cup | 7 g |
| Millet, cooked | 1 cup | 2 g |
| Quinoa, cooked | 1 cup | 5 g |
| Teff, grain, dry | 1/4 cup | 6 g |
| Triticale, flour, dry | 1/4 cup | 5 g |
| Wheat berries, dry | 1/4 cup | 5 g |
| Wild rice, cooked | 1 cup | 3 g |
| Wheat flour (whole wheat), dry | 1/4 cup | 4 g |
| Brown rice, cooked | 1 cup | 4 g |
| Bulgur, cooked | 1 cup | 8 g |
| Bread (whole wheat), sliced | 1 slice | 2 g |
| Crackers, rye wafers | 1 ounce | 6 g |
| Spaghetti (whole wheat), cooked | 1 cup | 6 g |
5. Sweet Peas. Peas, from fresh green peas to dried peas, are naturally chock full of fiber. In fact, food technologists have been studying pea fiber as a functional food ingredient. Make the most of peas by using fresh or frozen green peas and dried peas in soups, stews, side dishes, casseroles, salads, and dips.
| Food | Portion | Amount of Fiber |
| Cow peas (blackeyes), cooked | 1 cup | 11 g |
| Pigeon peas, cooked | 1 cup | 9 g |
| Peas, split, cooked | 1 cup | 16 g |
| Peas, green, frozen | 1 cup | 14 g |
| Peas (edible podded), cooked | 1 cup | 5 g |
6. Green, the Color of Fiber. Deep green, leafy vegetables are notoriously rich in beta-carotene, vitamins, and minerals, but their fiber content isn’t too shabby either. There are more than 1,000 species of plants with edible leaves, many with similar nutritional attributes, including high-fiber content. While many leafy greens are fabulous tossed in salads, sautéing them in olive oil, garlic, lemon, and herbs brings out a rich flavor.
| Food | Portion | Amount of Fiber |
| Turnip greens, cooked | 1 cup | 5 g |
| Mustard greens, cooked | 1 cup | 5 g |
| Collard greens, cooked | 1 cup | 5 g |
| Spinach, cooked | 1 cup | 4 g |
| Beet greens, cooked | 1 cup | 4 g |
| Swiss chard, cooked | 1 cup | 4 g |
7. Squirrel Away Nuts and Seeds. Go nuts to pack a fiber punch. One ounce of nuts and seeds can provide a hearty contribution to the day’s fiber recommendation, along with a bonus of healthy fats, protein, and phytochemicals. Sprinkling a handful of nuts or seeds over breakfast cereals, yogurt, salads, and desserts is a tasty way to do fiber.
| Food | Portion | Amount of Fiber |
| Almonds | 1 ounce | 4 g |
| Pistachio nuts | 1 ounce | 3 g |
| Cashews | 1 ounce | 1 g |
| Peanuts | 1 ounce | 2 g |
| Walnuts | 1 ounce | 2 g |
| Brazil nuts | 1 ounce | 2 g |
| Pinon nuts | 1 ounce | 12 g |
| Sunflower seeds | 1/4 cup | 3 g |
| Pumpkin seeds | 1/2 cup | 3 g |
| Sesame seeds | 1/4 cup | 4 g |
| Flaxseed | 1 ounce | 8 g |
8. Play Squash. Dishing up squash, from summer to winter squash, all year is another way that you can ratchet up your fiber intake. These nutritious gems are part of the gourd family and contribute a variety of flavors, textures, and colors, as well as fiber, vitamins, minerals, and carotenoids, to the dinner plate. Squash can be turned into soups, stews, side dishes, casseroles, salads, and crudités. Brush squash with olive oil and grill it in the summertime for a healthy flavorful accompaniment.
| Food | Portion | Amount of Fiber |
| Crookneck squash, cooked | 1 cup | 3 g |
| Summer scallop squash, cooked | 1 cup | 5 g |
| Hubbard squash, cooked | 1 cup | 7 g |
| Zucchini squash, cooked | 1 cup | 3 g |
| Acorn squash, cooked | 1 cup | 9 g |
| Spaghetti squash, cooked | 1 cup | 2 g |
9. Brassica or Bust. Brassica vegetables have been studied for their cancer-protective effects associated with high levels of glucosinolates. But these brassy beauties, including broccoli, cauliflower, kale, cabbage, and Brussels sprouts, are also full of fiber. They can be enjoyed in stir-fries, casseroles, soups, and salads and steamed as a side dish.
| Food | Portion | Amount of Fiber |
| Kale, cooked | 1 cup | 3 g |
| Cauliflower, cooked | 1 cup | 5 g |
| Kohlrabi, raw | 1 cup | 5 g |
| Savoy cabbage, cooked | 1 cup | 4 g |
| Broccoli, cooked | 1 cup | 5 g |
| Brussels sprouts, cooked | 1 cup | 6 g |
| Red cabbage, cooked | 1 cup | 4 g |
10. Hot Potatoes. The humble spud, the top vegetable crop in the world, is plump with fiber. Since potatoes are so popular in America, they’re an easy way to help pump up your fiber potential. Why stop at Russets? There are numerous potatoes that can provide a rainbow of colors, nutrients, and flavors, and and remember to eat the skins to reap the greatest fiber rewards. Try adding cooked potatoes with skins to salads, stews, soups, side dishes, stir-fries, and casseroles or simply enjoy baked potatoes more often.
| Food | Portion | Amount of Fiber |
| Russet potato, flesh and skin | 1 medium | 4 g |
| Red potato, flesh and skin | 1 medium | 3 g |
| Sweet potato, flesh and skin | 1 medium | 4 g |
11. Everyday Fruit Basket. Look no further than everyday fruits to realize your full fiber potential. Many are naturally packed with fiber, as well as other important vitamins and minerals. Maybe the doctor was right when he advised an apple a day, but he could have added pears, oranges, and bananas to the prescription as well. When between fruit seasons, seasons, rely on dried fruits to further fortify your diet. Include fruit at breakfast. Encourage including fruit at breakfast each morning instead of juice; mix dried fruits into cereals, yogurts, and salads; and reach for the fruit bowl at snack time. It’s a healthy habit all the way around.
| Food | Portion | Amount of Fiber |
| Banana | 1 medium | 3 g |
| Pear | 1 medium | 6 g |
| Orange | 1 medium | 4 g |
| Apple | 1 medium | 4 g |
| Prunes, | dried 1/2 cup | 6 g |
| Raisins | 2 ounces | 2 g |
| Peaches, dried | 1/4 cup | 3 g |
| Figs, dried | 1/2 cup | 8 g |
12. Global Destinations. Some of the plants with the highest fiber content in the world may be slightly out of your comfort zone and, for that matter, time zone. A rainbow of indigenous fruits and vegetables used in cultural food traditions around the globe are very high in fiber. Introduce a few new plant foods into your diet to push up the flavor, as well as fiber, quotient.
| Food | Portion | Amount of Fiber |
| Jicama, raw | 1 cup | 6 g |
| Chayote fruit, cooked | 1 cup | 4 g |
| Starfruit (carambola), raw | 1 cup | 4 g |
| Asian pear, raw | 1 fruit | 4 g |
| Hearts of palm, cooked | 1 cup | 4 g |
| Guava, raw | 1 cup | 9 g |
| Straw mushrooms, canned | 1 cup | 5 g |
| Abiyuch, raw | 1/2 cup | 6 g |
| Lotus root | 10 slices | 4 g |
| Persimmons, raw | 1 fruit | 6 g |
| Breadfruit | 1 cup | 11 g |
| Avocado, raw | 1/2 fruit | 9 g |
| Edamame, frozen | 1 cup | 6 g |
| Taro, sliced | 1 cup | 4 g |
13. Fiber Fortification Power. More foods, from juice to yogurt, are including fiber fortification in their ingredient lineup. Such foods may help busy people achieve their fiber goals. As consumer interest in foods with functional benefits, such as digestive health and cardiovascular protection, continues to grow, expect to see an even greater supply of food products promoting fiber content on supermarket shelves.
| Food | Portion | Amount of Fiber |
| Nature’s Own Double Fiber Wheat Bread |
1 slice | 5 g |
| Wasa Crispbread, Fiber Rye | 2 slices | 4 g |
| Weight Watcher’s Flakes ‘N Fiber |
1/2 cup | 9 g |
| Silk Soy Milk Plus Fiber | 1 cup | 5 g |
| Bob’s Red Mill Organic High Fiber Hot Cereal |
1/3 cup, dry | 10 g |
| Tropicana Orange Juice With Fiber |
1 cup | 3 g |
| Gnu Foods High Fiber Bar | 1 bar | 12 g |
| Fiber One Yoplait Yogurt | 4 ounces | 5 g |
Image: Chickpea Tabbouleh, Sharon Palmer, MSFS, RDN
For other blogs on increasing fiber, check out the following:
Power Up with Plants, Thanks to Pulses
Whole Grains, Good for Your Health and Wallet
The Latest Basics on Fiber
Fuel Your Diet with Fiber with 6 Dietitian Tips