Affiliate links on our site may earn us commissions. Learn More.

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy Policy.


Discover The Best Wellness Tips In Your Inbox

Subscribe to Health Reporter’s newsletter and get our health experts’ highlights and the latest news about healthy living.
The newsletters are spam-free and sent from our health experts and professionals.

Thank You!

You have successfully subscribed to our newsletter!

How do we vet brands and products? Learn more.

Home arrow Health arrow Gut Health arrow Benefiber vs. Metamucil: Battle of the Fiber Supplements

Benefiber vs. Metamucil: Battle of the Fiber Supplements

Written by Isabel Mayfield
Dr. Donika Vata
Fact checked by Donika Vata, MD
Last update: September 6, 2023
9 min read 720 Views 0 Reviews
clock 9 eye 720 comments 0

Can’t decide between these two popular fiber supplements? Let me make your decision a little easier.

Benefiber Vs. Metamucil - Battle of the Fiber Supplement

How do we vet brands and products? Learn more.

In the quest for better digestive health and overall well-being, fiber supplements have emerged as valuable allies. 

Among these, Benefiber and Metamucil stand as prominent contenders, each offering a unique blend of soluble fiber to support digestive health, regularity, and more. 

In this article, I will do a deep dive into these two dietary fiber supplement options, comparing the benefits, mechanisms, and ease of use of these two popular products.

Benefiber vs. Metamucil: Which Is Better?

There are a few popular fiber supplements floating around the Health Reporter office right now, and since I am no stranger to the benefits of hitting the recommended 25–30 grams of dietary fiber each day, I decided to test them out. 

The products I will be comparing today are Benefiber’s Original Prebiotic fiber supplement and Metamucil’s 4-in-1 Psyllium Fiber Powder.

After testing them based on their flavor and consistency and doing a deep dive online into the benefits of the active ingredients in each formula, I have landed on Benefiber as my personal favorite, and I’ll do a deep dive into the reasons below.

Comparison Winner: Benefiber

Can support healthy weight loss

Good for heart health

Tasteless and easily dissolves in beverages

Helps to relieve constipation

Uses a natural fiber source (psyllium husk)


Not suitable for individuals with gluten intolerance

May cause gas and bloating

Contains artificial flavors and sweeteners

No weight loss-related benefits

What is Benefiber?

Benefiber logo
Our rating:
  • Promotes bowel regularity
  • Improves nutrient absorption
  • Helps you feel fuller for longer
  • Lowers cholesterol levels
  • Prevents blood sugar spikes
Learn More

Benefiber is a popular dietary supplement that is designed to support your digestive health and, subsequently, your overall well-being. 

It is packed with natural wheat dextrin, a soluble fiber that I can verify is completely flavorless and easy to mix into your favorite beverage.

Integrating Benefiber’s Original Prebiotic fiber supplement into your routine seems as though it would be more or less effortless despite needing to take it three times a day for optimal results. 

Its ease of use makes it easy to take advantage of benefits like lowering cholesterol, managing blood sugar levels, and enhancing digestion for less bloating and constipation.

  • checkmark
    Contains natural ingredients
  • checkmark
    Improves gut microbiome
  • checkmark
    Formula is safe for diabetics
  • checkmark
    Dissolves completely in water
  • checkmark
    Contains only soluble fiber
  • checkmark
    Very budget-friendly
  • checkmark
    Though technically gluten-free, it is not suitable for individuals with gluten intolerances
  • checkmark
    Flavorless formula isn’t for everyone
  • checkmark
    May cause gas and bloating

What is Metamucil?

metamucil logo
Our rating:
  • Effectively relieves occasional constipation
  • Lowers LDL cholesterol levels
  • Stabilizes blood sugar
Learn More

Metamucil is a natural colon cleanser that enhances digestive comfort and overall digestive wellness. 

Rich in fiber derived from psyllium husk, it helps relieve constipation by creating a gel-like substance that softens stool, thus relieving constipation and enhancing digestive health.

Unlike Benefiber, Metamucil is not flavorless, and because of the high dose of psyllium husk powder, it doesn’t dissolve in water and instead takes on more of a gel-like texture.

Personally, I wasn’t in love with the gel and found it difficult to get down. I am also sensitive to artificial sweeteners and flavors, and therefore, I found the sweet, orangey taste to be a little much for my palette. Though, if you have a sweet tooth, I’m sure you won’t mind.

  • checkmark
    Gluten-free formula
  • checkmark
    Rich in both soluble and insoluble fiber
  • checkmark
    Comes in a variety of flavors
  • checkmark
    Gel-like texture can be off-putting
  • checkmark
    Contains artificial sweeteners
  • checkmark
    May cause indigestion
  • checkmark
    Slightly more expensive than Benefiber

How Do These Products Work?

Both Benefiber and Metamucil, like most colon cleansers and fiber supplements, rely on increasing your daily fiber intake in order to provide results and simply use a different set of ingredients to do so.

Benefiber delivers 3 grams of fiber per serving and is designed to be taken three times daily. It is formulated with wheat dextrin, a gluten substance extracted from wheat.

Metamucil, also designed to be taken three times daily or before meals, delivers 2.4 grams of fiber per serving and promises similar results.

While both Benefiber and Metamucil use different ingredients, the ingredients included in each formula have been shown to improve metabolic health by preventing the absorption of fat in the large intestine and slowing the breakdown of sugars to prevent blood sugar spikes.

Each fiber supplement also helps alleviate digestive discomfort and promote bowel regularity by aiding digestion in two ways. The gel-like consistency increases the water content of stool, helping to add bulk to it while simultaneously softening it, offering a laxative effect.


Health Reporter edit

Before purchasing a new product, I always double-check the ingredients to make sure it doesn’t contain anything I’m not comfortable putting in my body.

Here’s a deeper dive into the ingredients included in each fiber supplement blend.

Benefiber ingredients

Something that I love about Benefiber is just how simple its ingredient list is, containing only wheat dextrin, which I will explain in greater detail below.

#1 Wheat dextrin

Wheat dextrin is a type of soluble fiber that is processed from wheat starch. It forms a gel-like substance in the digestive tract, adding bulk to stool, softening it, and promoting regular bowel movements.

Metamucil ingredients

Although this fiber supplement contains mostly natural ingredients, there are some unnatural additives that you should be aware of.

#1 Psyllium husk

Psyllium husk is a plant-based source of soluble fiber from the seeds of the Plantago ovata plant. 

When used as a dietary supplement, it works by absorbing water in the digestive tract, forming a gel-like substance that softens stool, aids bowel movements, and supports heart health.

#2 Sucrose

Sucrose is a natural sugar commonly found in plants. It’s made up of glucose and fructose molecules and is often used as table sugar in cooking and sweetening foods.

#3 Citric acid

Citric acid is a weak organic acid found in citrus fruits like lemons and oranges. It’s used to enhance flavors in foods and beverages, and because of its acid properties, it works well as a preservative.

#4 Aspartame and Yellow 6

These are the two Metamucil ingredients that I’m not in love with.

Aspartame is an artificial sweetener used to sweeten foods and beverages while avoiding the unnecessary calories added by real sugar. It’s made from two amino acids, aspartic acid and phenylalanine, and is often used in diet sodas and other sugar-free products.

Yellow 6, also known as Sunset Yellow FCF, is a synthetic food color commonly used to give food products a bright yellow or orange hue. 

Food dyes, although useful in creating a more attractive product, have been shown to cause hypersensitivity reactions and are considered by many dieticians as an unnecessary food additive.


Since it’s estimated that many Americans reach only 30–40% of their recommended daily fiber intake, using fiber supplements to increase these percentages can offer various health benefits.

Both Benefiber and Metamucil offer similar benefits:

  • Balanced blood sugar levels 
  • Reduced “bad” LDL cholesterol levels
  • Better digestive health 

However, weight loss is a different story – while the wheat dextrin in Benefiber has shown promising results in regard to helping overweight adults lose weight by altering the gut microbiota, the type of fiber in Metamucil isn’t proven to help with weight loss.

Side Effects

When taking any dietary fiber supplement, regardless of whether it contains wheat dextrin or psyllium husk powder, you can expect to experience mild stomach upset as your stomach adjusts to the increased fiber intake.

Metamucil has the added downside of containing some unnatural ingredients, which, although technically safe for human consumption, have been shown to cause side effects like digestive upset and headaches.


Benefiber Vs Metamucil
Health Reporter edit

In the battle between Benefiber and Metamucil, I prefer Benefiber’s tasteless formula both for its versatility and simply because it’s easier to drink day after day. Here’s what the supplements taste like in more detail:

Benefiber: I was very surprised to find that Benefiber really doesn’t taste like anything and essentially dissolves completely in whatever you add it to. For that reason, you can pop it into beverages and even meals without a hitch.

Metamucil: The Metamucil formula is made to have a light, orangey taste and, because of the psyllium husk, results in a gel-like texture in water. 

Personally, I found the taste of Metamucil to be too sweet and slightly chemically, and though I didn’t struggle with drinking it during my short-lived experiment, I have a feeling I would feel differently after a few weeks of consistent use.


Price-wise, there’s not a huge difference between these two soluble fiber supplements. Metamucil is technically pricier, but only by a few dollars.

  • Benefiber: $12 to $15
  • Metamucil: $15 to $20

Prices vary depending on the retailer, but you can find these products easily online or in person at your local pharmacy or Walmart and can expect to spend around $15.

Benefiber vs. Metamucil vs. Alternatives

Comparison Winner: ColonBroom
Garden of Life Raw Organic Fiber
HumaN SuperBeets
Live Conscious® Beyond Greens™
Organifi Green Juice
KaraMD Pure Nature

Reduces blood sugar

Organic supplement with natural ingredients


Relieves constipation and stomach pain

Stimulates bowel movement within 24 hours

Gut and colon cleanser

Suitable for intermittent fasting

Boosts immunity

Supports muscle growth

Non-GMO and gluten-free supplement

Contains fiber from nutritious organic superfoods

Suppresses hunger cravings

Helps with constipation

Restores good gut bacteria

Lowers blood pressure

Adds nutrients to your diet

Encourages healthy blood circulation

Boosts stamina

Supports heart and gut health

Promotes the growth of good gut bacteria

Regular bowel function

Boosts your digestive system

Prevents constipation and diarrhea

Promotes healthier skin and hair

Results in as little as 2 days

Contains psyllium husk for a healthy gut

Strengthens your immune system

Provides a gut detox

Improves your energy levels

Gluten-free and non-GMO supplement

Boosts mental focus

Could help with weight management

Organic ingredients

Boosts immune function

Regulates a healthy metabolism

Reduces cortisol and stress levels

Gets rid of harmful toxins in your gut

Contains 11 detoxifying superfoods

Completely natural formula

Dissolves completely into water

Totally tasteless

Helpful tool in weight management

Wide variety of flavor options

Naturally-derived active ingredient

Improves your energy levels

Capsules are small and easy to consume

Gluten-free, vegan, and non-GMO

Contains nutrients from fruits and vegetables

Can lower the risk of heart disease

Cleanses your intestines


Not suitable for those who are pregnant or breastfeeding

Minor side effects like bloating

Chalky powder

High-calorie supplement

Only one sizing option available

Limited flavors

Not suitable for people with low blood pressure

Reports of powdery chunks

Doesn’t dissolve properly in cold water

Side effects such as bloating and cramps

Reports of a bad taste and texture

No third-party testing label

A lack of research on the website

Side effects such as dry mouth and dizziness

Not suitable for people with a nut allergy

May cause constipation for the first few days

Strong texture and smell

May cause bloating

Not suitable for individuals with gluten intolerances

Gluten-free formula

Contains artificial flavors and sweeteners

Requires four daily servings

No third-party testing

The proprietary blends don’t show the exact amount of ingredients

How I Tested

To improve the accuracy and fairness of my testing process, I always use a systematic approach to rate each product based on the same set of criteria.

This approach is designed to help me answer questions like: “Does this product serve its intended purpose?” “Does it deliver on value?” and “Are the ingredients good for me?”

Here’s a breakdown of each product based on my set of criteria:


What you put in your body matters, and I am a firm believer that nature knows best. 

Although both Benefiber and Metamucil fiber supplements use naturally derived ingredients, Benefiber’s formula does not include what I deem to be unnecessary additives such as artificial flavors and sweeteners, making it the clear winner in this category.


If you’re looking for a fiber supplement that’s guaranteed to work, you can’t go wrong with Benefiber and Metamucil. Both are considered industry leaders and have ample reviews affirming their efficacy.


Benefiber and Metamucil are in the same price range when considering their simplest and most popular formulas. Benefiber, however, has the added benefit of being a few dollars cheaper.

In terms of ease of purchase, the full range of products for both companies can be easily purchased at Walmart, CVS, Target, and Amazon.

Brand reputation

Benefiber products are produced by a US company, GSK Consumer Health, and have to date reported many satisfied customers. That being said, they did have an isolated incident in which products were recalled due to alleged plastic contamination.

Metamucil is a company that has been around since 1934 and is more or less a household name, so its long-standing reputation doesn’t leave much room for guessing.


What is the best form of fiber to take?

The best form of fiber for you to take will depend on your unique digestive needs. Soluble fiber is a great option for lowering cholesterol levels and balancing blood sugar levels, while insoluble fiber helps prevent constipation.

What is the main difference between Benefiber and Metamucil?

Both Benefiber and Metamucil work by promoting regular bowel movements and improving digestive health. However, Benefiber contains wheat dextrin, an ingredient that dissolves easily in water, while Metamucil is made primarily from psyllium husk, which forms a gel-like substance.

Which is more effective, Benefiber or Metamucil?

Benefiber and Metamucil feature different dietary fiber forms that can help improve digestion and overall gut health. The type that works best for you will depend on which type of fiber (wheat dextrin or psyllium husk) reacts better with your body.

How long does it take for fiber supplements to work?

Depending on the severity of your digestive upset, it can take 3–7 days for you to start noticing results. If your diet severely lacks fiber, you may continue noticing improvements in your digestion for several weeks after introducing fiber supplements.

A Word From an RD

Taking dietary fiber supplements can be a helpful way to ensure that you hit the recommended amount of fiber needed for you to feel your best, and it can make a world of difference for people dealing with digestive issues, such as irritable bowel syndrome.

Though these products can be helpful in improving gut health and promoting overall wellness through benefits related to blood sugar and cholesterol, don’t forget to prioritize other holistic lifestyle changes that can help.

For example, focusing on hydration and getting regular exercise, such as a light walk after big meals, can all have a huge impact on digestion.

Also, taking over-the-counter fiber supplements like Benefiber or Metamucil in combination with eating whole foods like beans, berries, and healthy grains will help maximize the potential benefits of fiber supplementation.


After testing these two products (albeit not for long) and doing more in-depth research about their ingredients, I can say with certainty that Benefiber is the better option.

I found the Benefiber formula more pleasant to drink, appreciate that it offers better results in regard to weight loss, and am a sucker for an all-natural ingredient list.

At the end of the day, though, both of these supplements can be a great addition to your diet if you struggle to meet the daily fiber intake.

Written by Isabel Mayfield
Isabel Mayfield is a certified yoga instructor with over 10 years of experience in the fitness industry. She is passionate about self-improvement and loves to help people improve their sense of self-worth through education and support in meeting their fitness goals.
The article was fact checked by Donika Vata, MD
Was this article helpful?
Thank you! We received Your feedback
Written by Isabel Mayfield
Dr. Donika Vata
Fact checked by Donika Vata, MD
Last update: September 6, 2023
9 min read 720 Views 0 Reviews
0 Reviews

Leave a review

Thank you for your comment!
We will review it as soon as possible.
Review title
Missing required field
Rating: 0 to 10
Missing required field. Entered rating must be between 0 to 10
Entered rating must be between 0 to 10
Your Name
Missing required field
Your Comment
Missing required field