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Home » Food Allergy Nutrition

Gluten Free Fiber (And Why You Need It!)

Published: Apr 11, 2021 · Updated: Apr 11, 2021 by Kristi Winkels, RDN, LD · This post may contain affiliate links · 2 Comments

If you're avoiding gluten due to a wheat allergy, Celiac disease, or gluten intolerance, finding gluten free fiber sources is an important part of having a balanced diet. Fiber not only makes you feel satisfied with meals but also promotes a healthy digestive system!

What is fiber?

Fiber is a type of carbohydrate found in plant foods that can’t be digested or absorbed by the body. There are two types of fiber: soluble and insoluble. 

A variety of foods containing gluten free fiber.

Insoluble fiber

Have you ever heard that fiber “keeps you regular”? Well, that's thanks to insoluble fiber! Insoluble fiber stays intact as it travels through the gastrointestinal tract, pulls water in, and adds bulk to the stool allowing it to move through the GI tract quicker. This promotes regular bowel movements and can help prevent diverticular disease (small pouches forming in the large intestine that can become infected).

Insoluble fiber also helps you feel satisfied after a meal and plays a role in regulating blood sugar.

Soluble fiber

Soluble fiber acts kind of like a sponge in the GI tract, soaking up water as it moves through. It helps lower cholesterol by attaching to the particles and carrying them out of the body in the stool. 

Like insoluble fiber, soluble fiber adds bulk to the stool which helps prevent constipation but it also can absorb excess water making it helpful in preventing diarrhea. 

Finally, soluble fiber also helps you feel fuller after a meal and, because it isn’t well absorbed, it has less of an effect on blood sugar rising which helps regulate blood sugar.

Gluten free fiber sources

Foods containing fiber usually have both insoluble and soluble fiber in varying amounts. Good sources of dietary fiber include fruits, vegetables, nuts, seeds, legumes, and whole grains. 

Fruits and vegetables 

A variety of fruits and vegetables that are good sources of gluten free fiber.

Fruits and vegetables are important sources of fiber even though they don’t all have a large amount per serving. That’s just one of the reasons why it’s important to have several servings of fruit and vegetables every day!

Including at least a fruit or vegetable at each meal helps meet that goal but don’t forget that snacks are a great time to eat these nutrient-packed foods, too!

Another idea is to try roasting a large batch of vegetables such as broccoli, carrots, cauliflower, and Brussel sprouts and keeping them in the refrigerator to eat throughout the week.

Or have a platter of veggies prepped and ready to go for an easy snack and perfect side to your lunchtime sandwich.

Keep frozen fruits on hand to add to smoothies or to put on yogurt (dairy free if you’re avoiding dairy). 

Add dried fruit to your bowl of oatmeal or mix into a trail mix with whole grain cereal and pumpkin seeds for a nutritious snack.

Fiber in fruit:

  • Avocado, one half, 9 grams
  • Raspberries, 1 cup, 8 grams 
  • Dried prunes (10), 6 grams
  • Blueberries, 1 cup, 4 grams
  • Pear, medium, 4 grams
  • Apple with skin, medium, 3.7 grams
  • Banana, medium, 3 grams
  • Orange, medium, 3 grams
  • Dried mango, 1 ounce, 3 grams
  • Dried peaches, ¼ cup, 3 grams
  • Pineapple, 1 cup, 2.5 grams
  • Raisins, 2 ounces, 2 grams

Fiber in vegetables:

  • Acorn squash, 1 cup, 9 grams
  • Artichoke, medium, 6.2 grams
  • Brussels sprouts, 1 cup, 6 grams
  • Baked potato with skin, medium, 5 grams
  • Sweet potato, medium, 5 grams
  • Green peas, ½ cup, 4 grams
  • Canned pumpkin, ½ cup, 3 grams
  • Spaghetti squash, 1 cup, 3 grams
  • Kale, 1 cup, 3 grams
  • Cooked broccoli or cauliflower, ½ cup, 2.5 grams
  • Green beans, ½ cup, 2 grams
  • Zucchini, 1 cup, 2 grams

Legumes (also known as pulses)

Beans, peas, and lentils are fiber-rich foods that also provide plant-based protein and phytonutrients.

Because legumes are starchy, they are often used in many gluten free products. Flour, pasta, and snack foods are just ways legumes have been incorporated into foods. 

Unfortunately, legumes sometimes have a reputation of causing excessive gas. If you are prone to this, try rinsing the beans before consuming them.

Lentils, garbanzo beans, and mung beans are among the easier-to-digest legumes so they are good ones to try. Also, having a smaller portion can help. As you will see in the list below, even a small portion of legumes packs a hefty fiber punch!

Try adding legumes to soups and casserole dishes. Make bean dip like hummus to have with whole grain gluten free crackers or veggie sticks. And try adding black beans to taco meats and other Mexican fare. You can also find a lot of gluten free pasta options that are made with legumes!

Fiber in legumes

  • Navy beans, ½ cup, 9.5 grams
  • Lentils, ½ cup, 8 grams
  • Kidney beans, ½ cup, 8 grams
  • Black beans, ½ cup, 7.5 grams
  • Mung beans, ½ cup, 7.5 grams
  • Pinto beans, ½ cup, 7.5 grams
  • Lima beans, ½ cup 7 grams
  • Edamame (soy), 1 cup, 6 grams
  • Garbanzo beans, ½  cup, 6 grams

Nuts and seeds

If you’re not allergic to peanuts and tree nuts, they are another option for boosting your fiber intake. If you do have a nut allergy, there might be some seeds that are safe for you that are also excellent sources of fiber.

Nuts and seeds that are sources of gluten free fiber.
Pumpkin seeds are one example of a gluten free fiber source.

Fiber in nuts, and seeds

  • Almonds, 1 ounce, 4 grams
  • Pistachios, 1 ounce, 3 grams
  • Peanuts, walnuts, or Brazil nuts, 1 ounce, 2 grams
  • Cashews, 1 ounce, 1 gram
  • Chia seeds, 2 tablespoons, 10 grams
  • Flax seeds, 2 tablespoons, 8 grams
  • Sesame seeds, ¼ cup, 4 grams
  • Sunflower or pumpkin seeds, ¼ cup, 3 grams
  • Sunflower butter, 2 tablespoons, 2 grams

Whole grains

A whole grain includes three parts: the endosperm, bran, and germ.

The anatomy of a whole grain that includes three parts: the bran, the germ, and the endosperm.

The bran is several layers on the outside of the grain. It contains fiber, B vitamins, fiber, and antioxidants. 

The germ is the embryo of the seed where a new plant can sprout from and it also contains some fiber, B vitamins, protein, and healthy fats.  

The endosperm is the largest part of the grain and is what remains when a grain is processed or “refined”. It contains starchy carbohydrates, some vitamins and minerals, and some protein. 

When a grain isn’t a whole grain, the germ and the bran have been removed and the endosperm remains. Sometimes grains are then “enriched” with vitamins and minerals that were lost in the process.

In addition to providing fiber, whole grains are a source of carbohydrates in the diet which provides energy. 

I often meet people who aren’t eating many grains once they begin following a gluten free diet because so many of the grains we eat are from wheat. But there are many gluten free whole grains that provide gluten free fiber!

A variety of gluten free whole grains including amaranth, millet, sorghum, brown rice, buckwheat, and corn.

Fiber in whole grains

The following gluten free whole grains are found in different forms including the grain itself, flour, pasta, cereals, tortillas, and bread. 

  • Amaranth, 1 cup cooked, 5 grams
  • Buckwheat, 1 cup cooked, 5 grams
  • Popcorn, 3 cups, 4 grams
  • Millet, 1 cup cooked, 2 grams
  • Oats, 1 cup cooked, 4 grams
  • Quinoa, 1 cup cooked, 5 grams
  • Brown rice, 1 cup cooked, 4 grams
  • Sorghum, 1 cup cooked, 5 grams
  • Teff, ¾ cup cooked, 4 grams
  • Wild rice, 1 cup cooked, 3 grams
  • Easy Gluten Free Cornbread
  • Quinoa and Rice With Sweet Potatoes
  • Nut Free Granola Bars
  • Proats (Protein Overnight Oats)

Need help?

Are you struggling to eat a balanced gluten free diet? You're not alone! Many of my clients struggle to get adequate fiber and this can lead to low energy, problems with digestion, and more.

Read more about my services and schedule a discovery call!

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Kristi Winkels, RDN, LD
Kristi Winkels, RDN, LD
Kristi Winkels is a Registered Dietitian and food allergy mom who helps people navigate dietary restrictions due to food allergies and intolerances. Read more about Kristi and get in touch here.
Kristi Winkels, RDN, LD
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  1. Greg says

    July 02, 2022 at 7:19 am

    Any ideas gluten free. Low potassium high fiber diet?

    Reply
    • Kristi Winkels says

      July 23, 2022 at 7:30 am

      Hi Greg, It can be challenging to eat a high fiber diet while keeping potassium intake low because many sources of fiber are high in potassium (fruits, vegetables, nuts/seeds, whole grains). Rice is a lower potassium food and many gluten free products like baked goods, pasta, etc are made with rice flour. Berries, apricots, pears, peaches, pineapple, and plums are all lower potassium fruits. Broccoli, cauliflower, green beans, peppers, peas, summer squash, lettuce, kale, cucumbers, carrots, radishes, and asparagus are some vegetables that are lower in potassium. These foods might not all be significant sources of fiber, but eating a variety throughout the day can help you reach the goal of 25-35 grams. I hope that helps but feel free to message me if you have more questions!

      Reply

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