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The 11 Best Fiber Supplements For Gut Health & Regularity, According To Experts*

Morgan Chamberlain
Author: Expert reviewer:
July 10, 2023
Morgan Chamberlain
Former mbg Supplement Editor
By Morgan Chamberlain
Former mbg Supplement Editor
Morgan Chamberlain is mindbodygreen's former supplement editor. She graduated from Syracuse University with a Bachelor of Science degree in magazine journalism and a minor in nutrition.
Ashley Jordan Ferira, Ph.D., RDN
Expert review by
Ashley Jordan Ferira, Ph.D., RDN
Former mbg Vice President of Scientific Affairs
Ashley Jordan Ferira, Ph.D., RDN is Vice President of Scientific Affairs at mindbodygreen. She received her bachelor's degree in Biological Basis of Behavior from the University of Pennsylvania and Ph.D. in Foods and Nutrition from the University of Georgia.
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Image by NADINE GREEFF / Stocksy
July 10, 2023
We carefully vet all products and services featured on mindbodygreen using our commerce guidelines. Our selections are never influenced by the commissions earned from our links.

With a whopping 95% of the U.S. population1 failing to get adequate fiber in their diet each day, the average American faces a serious fiber gap. Loading up your plate with fiber-rich foods (like fruits, veggies, whole grains, legumes, and seeds) at every meal is critical—and most will still struggle to meet their daily fiber needs.

"Most Americans do need to consume more fiber every day," says food science and nutrition professor at the University of Minnesota Joanne Slavin, Ph.D., R.D. "Since the recommended intake for fiber is 28 grams per day and most folks only consume around 16 grams, there may be a need for supplements."

Adding a high-quality fiber supplement with an efficacious dose of plant fiber to your daily routine can help you achieve your daily fiber goals to promote gut health, immune function, digestion, blood sugar balance, healthy bowel movements, and more.*

Quick list

Best insoluble fiber supplement
Metagenics MetaFiber®Go to review
Best gummy fiber supplement for kids
Nature Made Kids First Fiber Go to review
Best fiber supplement for your microbiome
Ora Organics Trust Your Gut Go to review
Best fiber supplement for cholesterol
Layer Origin BranPure® Oat Bran FiberGo to review
Best fiber supplement for women
Clear Dietary Fiber + PrebioticsGo to review
Best fiber supplement for men
Designs for Health PaleoFiberGo to review
Best fiber supplement for seniors
Nature MD NutriProteinGo to review

What is fiber?

Found exclusively in plants, fiber is a unique complex carbohydrate that doesn't break down in the digestive tract. Instead, it passes through the body undigested, making it an excellent "internal sweeper" for waste.* 

There are two types of fiber: Soluble fiber dissolves into a gel during digestion that helps collect and remove unwanted toxins, cholesterol, and extra hormones, while insoluble fiber adds to and forms the bulk of stool (i.e., it supports the motility and evacuation of poop).

While they can be found in capsule, tablet, and gummy form, most of the fiber supplements you'll find online and in stores are sold in a powder format.

A recap

Fiber is a unique complex carbohydrate that the body doesn't digest.

Benefits of fiber

Dietary fiber supports myriad areas of health.

It's most famous for its gut health and poop benefits—i.e., supporting a diverse and abundant gut microbiome, increasing bowel transit time, promoting regularity, aiding in stool formation and gut motility, and bolstering gut immunity and intestinal barrier function.*

However, fiber also promotes a healthy immune response, delivers mood balance by supporting the gut-brain axis, supports metabolic health factors (e.g., blood sugar balance, healthy cholesterol levels, appetite regulation), and aids natural detox pathways.*

How we picked the best fiber supplements

Quality

We include reputable brands that prioritize quality testing to ensure potency (and thus, efficacy) and purity (limiting heavy metals, yeast, mold, etc.). These are clean products with few or no additives, and you'll find USDA-certified organic options, too.

Diversity

This lineup features innovative products with a wonderfully diverse array of soluble and insoluble fibers with clinically researched benefits—from prebiotic nourishment for the gut microbiome to regularity, immune support, and loads more.*

Efficacy

Our selections deliver dietary fiber in efficacious forms and strengths (no sprinkling allowed). From legumes and mushrooms to fruits, oats, and more, you’ll find meaningful daily doses of plant fibers here.

Sustainability

We take pride in highlighting green initiatives and certifications, as well as sustainable product features that honor the environment through recyclable, eco-friendly packaging options.

mbg's picks for best fiber supplements of 2024

Best organic fiber supplement: mindbodygreen organic fiber+ with prebiotic support

Pros

  • Plant-powered soluble & insoluble fibers
  • Prebiotic, probiotic & postbiotic promoting ingredients
  • Family friendly (formulated for kids 4+)

Cons

  • Not recommended for individuals with serious legume sensitivities (features guar bean fiber)

Form:

powder

Dietary considerations:

USDA certified organicGMO-freegluten-freesoy-freenut-freevegan/vegetarian

Environmental impact:

sustainably packaged

Dose:

1 scoop daily

Servings per container:

20

With a unique blend of soluble, insoluble, and prebiotic plant fibers (via organic guar beans, mushrooms, and green kiwifruit) and 5 billion CFUs of resilient, spore-forming probiotic strain (Bacillus subtilis ATCC122264), this vegan powder delivers targeted ingredients to help diversify your gut microbiome, support short-chain fatty acid production (can aid intestinal barrier function), bolster gut immunity, and support healthy bowel movements. Plus, its high-potency dose of dietary fiber (six grams) helps bridge the fiber gap that faces 95% of the U.S. population (even kids!). Healthy poop and regularity, for all!*

Best insoluble fiber supplement: Metagenics MetaFiber®

Pros

  • 6 grams of insoluble fiber to supports GI regularity*

Cons

  • Plastic container

Form:

powder

Dietary considerations:

GMO-freegluten-freevegetarian

Dose:

1 scoop daily

Servings per container:

38

Designed to support healthy intestinal transit time and regularity, this fiber blend delivers six grams of dietary fiber from oat hull and apple, making it perfect for individuals sensitive to psyllium, wheat, corn, or citrus. Packed with insoluble fiber (and soluble fiber, too!), this powder is a great addition to your morning coffee, tea, or smoothie to aid healthy bowel movements and overall gut health.*

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Best gummy fiber supplement for kids: Nature Made Kids First Fiber

Pros

  • Supports digestive health*
  • Family friendly (formulated for kids 4+)

Cons

  • Long list of “other” ingredients
  • Plastic bottle

Form:

powder

Dietary considerations:

gluten-free

Dose:

2 gummies daily

Servings per container:

30

While powder is an effective and popular delivery format for fiber supplements, it can be challenging to sneak into foods and drinks without your picky eaters noticing its distinctive flavor. Alternatively, these daily gummies come in three delicious flavors (strawberry, lemon, and orange) that will have your kiddos begging for more fiber without even realizing it. Take that, national fiber gap!*

Best fiber supplement for your microbiome: Ora Organics Trust Your Gut

Pros

  • 7 probiotic strains
  • Family friendly
  • No added sugars

Cons

  • Natural flavor

Form:

powder

Dietary considerations:

USDA certified organicGMO-freegluten-freedairy-freesoy-freenut-freevegan/vegetarian

Environmental impact:

sustainably packaged

Dose:

1 scoop daily

Servings per container:

30

Featuring seven Lactobacillus and Bifidobacterium strains (20 billion CFUs) and an organic prebiotic fiber blend of Jerusalem artichoke inulin and tapioca oligosaccharide, this fiber powder supports diversity and abundance of beneficial bacteria in the gut for immune health, mood balance, and healthy digestion. Choose from two delicious flavor profiles (apple raspberry and lavender lemonade) and mix a scoop into your chosen beverage for a sweet treat for you and your GI tract.*

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Best fiber supplement for cholesterol: Layer Origin BranPure® Oat Bran Fiber

Pros

  • Cardiovascular support*
  • Oat beta-glucan

Cons

  • Good (not excellent) source of dietary fiber (3 grams)
  • May contain wheat
  • Plastic container

Form:

powder

Dietary considerations:

GMO-freedairy-freenut-free

Dose:

1 scoop daily

Servings per container:

30

Speaking of metabolic health… This oat bran supplement delivers activated oat fiber with 28% soluble oat beta-glucan to help support healthy cholesterol levels and overall cardiovascular function. In addition to “bad” cholesterol, soluble fiber binds to and removes other unwanted compounds—such as environmental toxins, extra hormones, and other waste. Consume one scoop per day for holistic cardiometabolic and digestive health support.*

Best soluble fiber supplement: Microingredients Organic Triple Fiber

Pros

  • Inulin, acacia, psyllium fiber trio
  • Promotes healthy detoxification*

Cons

  • Doesn’t dissolve well in cold water

Form:

powder

Dietary considerations:

USDA certified organicGMO-freegluten-freedairy-freesoy-freenut-freevegan/vegetarian

Environmental impact:

sustainably packaged

Dose:

2 scoops daily

Servings per container:

113

Delivering organic chicory root inulin, acacia, and psyllium husk, this triple threat of prebiotic soluble fibers is your vegan solution to promoting healthy digestion, detoxification, gut microbiota balance, bowel movements, and more. Simply add a scoop to any beverage or food each day to give your GI tract the support it needs to maintain a healthy balance of beneficial bacteria.*

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Best fiber supplement for keto: Garden of Life Organic Raw Fiber Powder

Pros

  • 15 raw superfoods
  • Omega-3 fatty acids
  • Paleo friendly
  • Certified B Corp

Cons

  • Contains tree nut allergen (coconut)

Form:

powder

Dietary considerations:

USDA certified organicGMO-freegluten-freedairy-freesoy-freevegan/vegetarian

Environmental impact:

sustainably packaged

Dose:

1 scoop daily

Servings per container:

30

It’s challenging for most Americans to get enough dietary fiber each day, but this gut-critical carbohydrate can be especially tough to come by when you’re following a keto diet. This keto-friendly supplement delivers an excellent source of fiber (nine grams per serving) from an array of 15 raw, organic superfood seeds (flax, chia, sunflower, pumpkin, sesame) ancient grains (amaranth, quinoa, millet, buckwheat), legumes (garbanzo bean, lentil, adzuki bean), and nuts (coconut flour)—in a recyclable container, we might add.*

Best low FODMAP fiber supplement: Supergut The Gut Balancing Fiber Mix

Pros

  • Keto friendly
  • Resistant starch fiber blend

Cons

  • Doesn’t dissolve well in cold water
  • Individual packaging (not eco-friendly)

Form:

powder

Dietary considerations:

soy-free

Dose:

1 stick pack daily

Servings per container:

28

For those sensitive to FODMAP carbohydrates, this keto-friendly (and Monash University Low FODMAP certified) fiber blend of green banana powder resistant starch, soluble vegetable fiber (from corn), beta-glucan (from oats, and resistant potato starch is a great way to get an eight-gram serving of dietary fiber daily (without any added sugars). Mix the unflavored powder into your coffee, tea, oatmeal, or soup at home or on the go—the choice is yours, thanks to its individually packaged servings!*

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Best fiber supplement for women: Clear Dietary Fiber + Prebiotics

Pros

  • Supports glowing skin*
  • Plant-powered formula
  • No added sugars

Cons

  • Manufactured in a facility that processes food allergens

Form:

powder

Dietary considerations:

gluten-freedairy-freesoy-freenut-freevegetarian

Dose:

1 scoop daily

Servings per container:

30

Ladies, adding more dietary fiber to your diet can help promote regularity, ease bloat, aid vitamin and mineral absorption, regulate blood sugar levels, balance your gut microbiome, and support healthy, clear skin. So, what are you waiting for? This high-fiber blend delivers a daily, five-gram dose of soluble, insoluble, and prebiotic fibers from psyllium husk, flaxseeds, organic apples, peas, and chia seeds to promote gut, mood, and metabolic health.*

Best fiber supplement for men: Designs for Health PaleoFiber

Pros

  • 12-in-1 fiber blend
  • Paleo friendly

Cons

  • Good (not excellent) source of fiber (3 grams)

Form:

powder

Dietary considerations:

GMO-freegluten-freedairy-freesoy-freevegan/vegetarian

Environmental impact:

sustainably packaged

Dose:

1 scoop daily

Servings per container:

60

Our paleolithic ancestors consumed over 100 grams of dietary fiber on a daily basis! On average, Americans only consume around 16 grams per day. (Yikes.) Whether you follow the paleo diet or simply want a comprehensive fiber blend sans grains (e.g., wheat, oat, rice bran) and legumes (e.g., peas, beans, soy), this unflavored powder delivers: With an array of twelve types of soluble and insoluble fibers (i.e., acacia gum, cellulose, guar gum, cranberry seed powder, carrot fiber, inulin, orange fiber, apple pectin, glucomannan, psyllium husk, flax, and prune), this fiber supplement promotes healthy weight maintenance, glucose and lipid metabolism, gastrointestinal support, and more.*

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Best fiber supplement for seniors: Nature MD NutriProtein

Pros

  • Supports muscle, metabolism & weight maintenance*
  • Organic herbal prebiotics

Cons

  • Not recommended for individuals with serious legume sensitivities
  • Contains tree nut allergen (coconut)
  • Plastic container

Form:

powder

Dietary considerations:

GMO-freegluten-freedairy-freesoy-freevegan/vegetarian

Environmental impact:

sustainably sourced

Dose:

1 scoop daily

Servings per container:

15

This plant-based protein powder delivers an efficacious seven-gram dose of dietary fiber (from inulin, acacia, chia seeds, and guar gum), plus additional ingredients adults need later in life to support whole body-health and longevity—such as protein (from peas and sustainably grown chickpeas) for musculoskeletal function and strength and moringa powder for metabolic health and energy. (And did we mention the chocolate vanilla flavor profile? Yum!)*

Comparing the best organic fiber supplements

Product PriceFormSizeCost per servingFiber per servingDose
mindbodygreen organic fiber+ with prebiotic support$60.00Powder5.8 oz$3.006 g1 scoop
Metagenics MetaFiber®$40.00Powder10.7 oz$1.056 g1 scoop
Ora Organics Trust Your Gut$37.00Powder7.9 oz$1.23Unknown1 scoop
Layer Origin BranPure® Oat Bran Fiber$25.00Powder5.7 oz$0.833 g1 scoop
Microingredients Organic Triple Fiber$30.00Powder32 oz$0.276 g2 scoops
Garden of Life Organic Raw Fiber Powder$34.00Powder12.3 oz$1.139 g1 scoop
Supergut The Gut Balancing Fiber Mix$59.00Powder10 oz$2.118 g1 stick pack
Clear Dietary Fiber + Prebiotics$33.00Powder10.6 oz$1.105 g1 scoop
Designs for Health PaleoFiber$51.00Powder10.6 oz$0.853 g1 scoop
Nature MD NutriProtein$54.00Powder18.8 oz$3.607 g1 scoop
Nature Made Kids First Fiber$18.00GummyUnknown$0.604 g2 gummies

How to choose a fiber supplement

Shopping for a fiber supplement can be overwhelming, to say the least. First and foremost, you should look for efficacious doses of dietary fiber from science-backed ingredients clinically shown to deliver your desired health benefits (like those on this vetted list).

Adding more fiber to your diet can help balance your mood, enhance your gut health, support a healthy body composition, bolster your immune system, aid in digestion, and promote healthy bowel movements and regularity.* Look for a tailored formula that includes an effective dose of fiber and supports the area of health you're looking to improve.

Lastly, it's important to consult your healthcare provider before adding any new supplement to your routine.

Summary

When choosing a fiber supplement, look for efficacious doses of dietary fiber made from science-backed ingredients.

Fiber dosage

The recommended daily fiber intake varies depending on a person's age, gender, and overall health. However, research suggests that total dietary fiber intake2 should be roughly 25 g for adult women and 34 g for adult men. Here are some general guidelines for adults and children:

  • 2-3 years: Females and Males (14 g)
  • 4-8 years: Females (17 g) and Males (20 g)
  • 9-13 years: Females (22 g) and Males (25 g)
  • 14-18 years: Females (25 g) and Males (31 g)
  • 19-30 years: Females (28 g) and Males (34 g)
  • 31-50 years: Females (25 g) and Males (31 g)
  • 51+ years: Females (22 g) and Males (28 g)


Soluble vs. insoluble fiber

There are two broad categories of fiber: soluble (many are also considered viscous fibers) and insoluble (also called “bulking fiber”). Your body handles each type of fiber differently, and, because of that, they play different roles in your health. 

"Soluble fiber dissolves into a gel-like substance that is important to help capture and remove toxins and cholesterol from the body," explains registered dietitian Amy Shapiro, M.S., R.D., CDN. Insoluble fiber is not digested by the body or absorbed into the bloodstream. Instead, it forms the "weight" and "bulk" of stools in the body, acting as a broom of sorts by sweeping waste along and aiding evacuation.

Both forms can help you feel full by creating volume in the digestive tract that lets your brain know you've eaten, but each also has specific benefits tied to how your body handles them.

Frequently Asked Questions

What is the best form of fiber to take?

While fiber supplements come in capsule, tablet, and gummy form, most can be found in a powder format (to accommodate efficacious doses of fiber). Look for a supplement that features insoluble, soluble, and prebiotic fibers from a variety of plant fibers to holistically support the gut microbiome, regularity, gut motility, detoxification and myriad of other health benefits.*

Is it OK to take a fiber supplement every day?

Most Americans are not getting enough dietary fiber. Fiber supplements are a safe and effective way to increase your intake and ensure you're addressing your daily fiber needs.

What's the best time of day to take fiber?

You can take a fiber supplement any time that works best for you and your meal schedule. "You should consume fiber at every meal," Slavin says. "Most folks take fiber supplements in the morning, but [time of day] isn't well studied." 

Whether you're eating a high-fiber meal or taking a fiber supplement, be sure to drink at least 8 ounces of water for every 25 grams of fiber you consume to further support your digestion and bowel movements.

The takeaway

Fiber makes healthy digestion, regularity, and bowel movements possible—and most Americans aren't getting nearly enough.* In addition to a well-balanced diet filled with fiber-rich plant foods, a daily fiber supplement can help you further address your daily needs and fully bridge the fiber gap.*

If you are pregnant, breastfeeding, or taking medications, consult with your doctor before starting a supplement routine. It is always optimal to consult with a health care provider when considering what supplements are right for you.

Meet The Experts

Morgan Chamberlain is mindbodygreen's former supplement editor. She graduated from Syracuse University with a Bachelor of Science degree in magazine journalism and a minor in nutrition.
Ashley Jordan Ferira, Ph.D., RDN is Vice President of Scientific Affairs at mindbodygreen. She received her bachelor's degree in Biological Basis of Behavior from the University of Pennsylvania and Ph.D. in Foods and Nutrition from the University of Georgia.

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