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Box of Momentous Fiber+ Pure Cinnamon packets displayed open with sachets inside. Packaging reads: “Momentous,” “Fiber+ is a comprehensive formula of fibers and starches. Sufficient daily fiber intake promotes digestive health including gut microbiome diversity, gastrointestinal regularity, heart health, and metabolic health†.” Front of box reads: “Pure Cinnamon,” “Fiber+,” “Digestive & Gut Health†,” “10 Packets,” “Dietary Supplement Net Wt. 3.7 oz (104g),” and “livemomentous.com.”
Box of Momentous Fiber+ packets displayed open with individual sachets inside. Packaging reads: “Momentous,” “Fiber+ is a comprehensive formula of fibers and starches. Sufficient daily fiber intake promotes digestive health including gut microbiome diversity, gastrointestinal regularity, heart health, and metabolic health†.” Front of box reads: “Unflavored,” “Fiber+,” “Digestive & Gut Health†,” “10 Packets,” “Dietary Supplement Net Wt. 3.4 oz (96g),” and “livemomentous.com.”
Person opening a white Momentous Fiber+ packet. Text reads: “It’s more than just fiber. It’s Fiber+.” Packet shows “Pure Cinnamon,” “Fiber+,” “Digestive & Gut Health†,” and “Dietary Supplement Net Wt. 0.37 oz (10.4g).” Additional text reads: “Fiber+ goes beyond digestive regularity with a 3-in-1 formula containing soluble fiber, insoluble fiber, and prebiotic resistant starch for full system support.”
Even High Performers Fall Short. 95% of Americans Do Not Consume Enough Fiber. Yet 67% of Americans THINK They Consume Enough Fiber. Only 5% of Americans ACTUALLY Consume Enough Fiber.
Fiber+ Pure Cinnamon packet placed on a surface of cinnamon powder. Text reads: “Best tasting fiber ever! Have used the Fiber+ for almost a month. As a regular fiber user I can say it keeps things moving as expected. It is the flavor that deserves 5 stars. Pure Cinnamon Fiber+ combined with Vanilla Protein powder is straight up horchata! — Douglas M. Verified Buyer.” Packet shows “Momentous,” “Pure Cinnamon,” “Fiber+,” “Digestive & Gut Health†,” and “Dietary Supplement Net Wt. 0.37 oz (10.4g).”
Graphic titled “3-in-1 Fiber+ Formula” showing three components: 01. Soluble fiber from psyllium husk for steady energy; 02. Resistant starch from potatoes for gut resilience; 03. Insoluble fiber from rice bran for smooth digestion.
Close-up of a person adding fresh raspberries to a blender cup with milk and a banana nearby on a kitchen counter. Overlaid text reads: “Fiber+ supports gut health as a full system, not a single digestive outcome.” Bullet points: “Prebiotic-Powered Performance,” “Steady + Stable Energy,” “Supports the Gut-Brain Connection,” and “End-to-End Digestive Support.”
A close-up of loose fiber powder spread across a neutral background with text overlay. Text reads: “Fiber+ 10-Travel Packs” “How to Use:” “Mix 1 Pack (6g fiber) with 12–16 fl oz of your preferred liquid daily. Can also be added to your protein shake.” “Drink shortly after mixing.” “*Experts recommend a daily fiber intake of 22–34 grams depending on age and body composition”
Two boxes of Momentous Fiber+ (Unflavored and Pure Cinnamon) on a clean surface. Text reads: “Fiber+ is made to The Momentous Standard™,” “Just The Essentials Fiber+ Cinnamon is made with real cinnamon bark, no artificial flavors.” “NSF Certified for Sport® Fiber+ is third-party tested and certified to the strictest standard.” Bottom text reads: “The Momentous Standard” and “Our unrelenting pursuit of building the best.” Boxes display “Fiber+,” “Digestive & Gut Health†,” and product weights.
Man (Arnold Schwarzenegger) pouring Fiber+ into a shaker bottle. Text reads: “Expert-Guided Fiber+ was developed in partnership with Arnold Schwarzenegger and the experts at The Pump Club.” Quote reads: “If I had to pick just one thing to take daily that could change your life, it’s Fiber+. Your gut health is where everything starts.” — Arnold Schwarzenegger.
Supplement Facts label for Fiber+ Pure Cinnamon. Text reads: “Fiber+,” “Pure Cinnamon,” “Supplement Facts,” “Serving Size: 1 Packet (10.4g),” “Servings Per Container: 10.” “Amount Per Serving % Daily Value.” “Calories 35.” “Total Carbohydrate 8g 3%.” “Dietary Fiber 6g 21%.” “Psyllium Husk 4g**.” “Resistant Potato Starch 3.5g (Solnul®).” “Rice Bran Hull 2g.” “*Percent Daily Values are based on a 2,000 calorie diet.” “**Daily value not established.” “Other Ingredients: Cinnamon Bark Powder, Sunflower Lecithin
Supplement Facts label for Fiber+ Unflavored. Text reads: “Fiber+,” “Unflavored,” “Supplement Facts,” “Serving Size: 1 Packet (9.6g),” “Servings Per Container: 10.” “Amount Per Serving % Daily Value.” “Calories 35.” “Total Carbohydrate 7g 3%.” “Dietary Fiber 6g 21%.” “Psyllium Husk 4g**.” “Resistant Potato Starch 3.5g**.” “Rice Bran Hull 2g**.” “*Percent Daily Values are based on a 2,000 calorie diet.” “**Daily value not established.” “Other Ingredients: Sunflower Lecithin.”
Box of Momentous Fiber+ Pure Cinnamon packets displayed open with sachets inside. Packaging reads: “Momentous,” “Fiber+ is a comprehensive formula of fibers and starches. Sufficient daily fiber intake promotes digestive health including gut microbiome diversity, gastrointestinal regularity, heart health, and metabolic health†.” Front of box reads: “Pure Cinnamon,” “Fiber+,” “Digestive & Gut Health†,” “10 Packets,” “Dietary Supplement Net Wt. 3.7 oz (104g),” and “livemomentous.com.”
Box of Momentous Fiber+ packets displayed open with individual sachets inside. Packaging reads: “Momentous,” “Fiber+ is a comprehensive formula of fibers and starches. Sufficient daily fiber intake promotes digestive health including gut microbiome diversity, gastrointestinal regularity, heart health, and metabolic health†.” Front of box reads: “Unflavored,” “Fiber+,” “Digestive & Gut Health†,” “10 Packets,” “Dietary Supplement Net Wt. 3.4 oz (96g),” and “livemomentous.com.”
Person opening a white Momentous Fiber+ packet. Text reads: “It’s more than just fiber. It’s Fiber+.” Packet shows “Pure Cinnamon,” “Fiber+,” “Digestive & Gut Health†,” and “Dietary Supplement Net Wt. 0.37 oz (10.4g).” Additional text reads: “Fiber+ goes beyond digestive regularity with a 3-in-1 formula containing soluble fiber, insoluble fiber, and prebiotic resistant starch for full system support.”
Even High Performers Fall Short. 95% of Americans Do Not Consume Enough Fiber. Yet 67% of Americans THINK They Consume Enough Fiber. Only 5% of Americans ACTUALLY Consume Enough Fiber.
Fiber+ Pure Cinnamon packet placed on a surface of cinnamon powder. Text reads: “Best tasting fiber ever! Have used the Fiber+ for almost a month. As a regular fiber user I can say it keeps things moving as expected. It is the flavor that deserves 5 stars. Pure Cinnamon Fiber+ combined with Vanilla Protein powder is straight up horchata! — Douglas M. Verified Buyer.” Packet shows “Momentous,” “Pure Cinnamon,” “Fiber+,” “Digestive & Gut Health†,” and “Dietary Supplement Net Wt. 0.37 oz (10.4g).”
Graphic titled “3-in-1 Fiber+ Formula” showing three components: 01. Soluble fiber from psyllium husk for steady energy; 02. Resistant starch from potatoes for gut resilience; 03. Insoluble fiber from rice bran for smooth digestion.
Close-up of a person adding fresh raspberries to a blender cup with milk and a banana nearby on a kitchen counter. Overlaid text reads: “Fiber+ supports gut health as a full system, not a single digestive outcome.” Bullet points: “Prebiotic-Powered Performance,” “Steady + Stable Energy,” “Supports the Gut-Brain Connection,” and “End-to-End Digestive Support.”
A close-up of loose fiber powder spread across a neutral background with text overlay. Text reads: “Fiber+ 10-Travel Packs” “How to Use:” “Mix 1 Pack (6g fiber) with 12–16 fl oz of your preferred liquid daily. Can also be added to your protein shake.” “Drink shortly after mixing.” “*Experts recommend a daily fiber intake of 22–34 grams depending on age and body composition”
Two boxes of Momentous Fiber+ (Unflavored and Pure Cinnamon) on a clean surface. Text reads: “Fiber+ is made to The Momentous Standard™,” “Just The Essentials Fiber+ Cinnamon is made with real cinnamon bark, no artificial flavors.” “NSF Certified for Sport® Fiber+ is third-party tested and certified to the strictest standard.” Bottom text reads: “The Momentous Standard” and “Our unrelenting pursuit of building the best.” Boxes display “Fiber+,” “Digestive & Gut Health†,” and product weights.
Man (Arnold Schwarzenegger) pouring Fiber+ into a shaker bottle. Text reads: “Expert-Guided Fiber+ was developed in partnership with Arnold Schwarzenegger and the experts at The Pump Club.” Quote reads: “If I had to pick just one thing to take daily that could change your life, it’s Fiber+. Your gut health is where everything starts.” — Arnold Schwarzenegger.
Supplement Facts label for Fiber+ Pure Cinnamon. Text reads: “Fiber+,” “Pure Cinnamon,” “Supplement Facts,” “Serving Size: 1 Packet (10.4g),” “Servings Per Container: 10.” “Amount Per Serving % Daily Value.” “Calories 35.” “Total Carbohydrate 8g 3%.” “Dietary Fiber 6g 21%.” “Psyllium Husk 4g**.” “Resistant Potato Starch 3.5g (Solnul®).” “Rice Bran Hull 2g.” “*Percent Daily Values are based on a 2,000 calorie diet.” “**Daily value not established.” “Other Ingredients: Cinnamon Bark Powder, Sunflower Lecithin
Supplement Facts label for Fiber+ Unflavored. Text reads: “Fiber+,” “Unflavored,” “Supplement Facts,” “Serving Size: 1 Packet (9.6g),” “Servings Per Container: 10.” “Amount Per Serving % Daily Value.” “Calories 35.” “Total Carbohydrate 7g 3%.” “Dietary Fiber 6g 21%.” “Psyllium Husk 4g**.” “Resistant Potato Starch 3.5g**.” “Rice Bran Hull 2g**.” “*Percent Daily Values are based on a 2,000 calorie diet.” “**Daily value not established.” “Other Ingredients: Sunflower Lecithin.”
4.7
Rated 4.7 out of 5 stars
174

Fiber+ 10-Travel Packs

10 Single Serving Packets $2.17/Serving

Soluble fiber, insoluble fiber, and prebiotic resistant starch to support performance in single-serve travel packs

  • Steadier energy through glucose regulation
  • Supports healthy gut–brain signaling
  • End-to-end digestive support
Size: 10 Travel Packs
Select Flavor: Pure Cinnamon
1

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“After a week I feel amazing. More energy, better digestion. I put it in my smoothie every morning”

Thomas (Verified Customer)

“The cinnamon flavor is soo delicious! I've mixed it into water, iced latte, oatmeal and into pancakes.”

Erin (Verified Customer)

“Disolves easily and has great taste. I mix it with the vanilla whey protein and have an instant horchata.”

Mabel (Verified Customer)

Comprehensive Gut Health, Anywhere You Go

Fiber+ Travel Packs deliver all three essential fiber types—soluble, insoluble, and prebiotic resistant starch to activate gut health as the foundation for performance, in a precise single-serve pack.

Prebiotic-Powered Performance

  • Features Solnul® resistant potato starch to feed beneficial gut bacteria
  • Supports production of short-chain fatty acids (SCFAs) to strengthen the gut barrier
  • Promotes better nutrient absorption, energy metabolism, and recovery

Steady and Stable Energy

  • Psyllium husk soluble fiber helps slow carb absorption
  • Supports healthy blood sugar levels after meals
  • Helps promote insulin sensitivity and metabolic stability
  • Encourages steady energy without spikes and crashes

Supports the Gut-Brain Connection

  • Supports the gut–brain connection through microbiome health
  • Helps reinforce pathways tied to focus, mood, and stress response
  • Promotes consistent mental clarity to support overall performance

End-to-End Digestive Support

  • Combines soluble (psyllium) and insoluble (rice bran) fiber
  • Supports digestive movement and stool bulk for regularity
  • Promotes smoother digestion

How Fiber+ Works*

Builds a More Resilient Microbiome

  • Solnul® resistant potato starch reaches the colon and ferments into short-chain fatty acids (SCFAs) like butyrate, which support gut barrier integrity and beneficial bacteria such as Bifidobacterium and Akkermansia.
  • Key Ingredient: Solnul® Resistant Potato Starch

Supports Metabolic Stability

  • Soluble fiber slows carbohydrate absorption to help moderate post-meal blood sugar, while SCFAs support insulin sensitivity and metabolic efficiency.
  • Key Ingredients: Psyllium Husk + Solnul® Resistant Potato Starch

Supports the Gut–Brain Axis

  • Fermentation of resistant starch produces short-chain fatty acids (SCFAs), which help regulate immune signaling and gut–brain communication pathways.
  • Key Ingredients: Solnul® Resistant Potato Starch + Psyllium Husk

Promotes Stool Hydration & Motility

  • Psyllium increases stool hydration and rice bran adds bulk, supporting smooth transit and consistent digestive comfort.
  • Key Ingredients: Psyllium Husk + Rice Bran

Mix 1 pack (6g fiber) with 12-16 fl oz of your preferred liquid daily. Mix into meals, smoothies, or shakes. 

Post-workout or evening intake often works well, especially if you train intensely earlier in the day. 

Drink shortly after mixing for a lighter texture — Fiber+ will thicken over time.

Should not be taken within two hours before or after taking iron.

*Experts recommend a daily fiber intake of 25-38 grams depending on age and body composition

6g dietary fiber in each travel-pack of Fiber+.

Pure Cinnamon: Psyllium Husk, Resistant Potato Starch (Solnul®), Rice Bran Hull

Other Ingredients: Cinnamon Bark Powder, Sunflower Lecithin, Reb M*

Unflavored: Psyllium Husk, Resistant Potato Starch (Solnul®), Rice Bran Hull

Other Ingredients: Sunflower Lecithin

*Reb M is a natural, plant-based sweetener with zero glycemic response or aftertaste. Our Reb M is made from fermented rice and is 250× sweeter than sugar without bloating, 2.5× sweeter than monk fruit, and made sustainably with less land, water, and crop rotation.

Take Fiber+ at the time of day you can be most consistent — that’s what drives the biggest digestive and metabolic benefits. Morning hydration, with your first meal, in a protein shake, or evening wind-down all work.

You may notice easier, more regular stools within 12–48 hours, with fuller microbiome and metabolic benefits building over 1–4 weeks of steady use.

Expect improved bowel comfort, better stool quality, reduced bloating over time, and added satiety/steadier blood sugar when your intake is consistent.

There are 8 credible reviews and studies related to this product:

1. Consumption of Solnul™ resistant potato starch produces a prebiotic effect in a randomized, placebo-controlled clinical trial

“Clinically shown to support beneficial gut bacteria at just 3.5g per day, including Bifidobacterium and Akkermansia.”

2. The impact of diet and lifestyle on gut microbiota and human health

“Prebiotics have been shown to improve bowel and immune function, metabolic health and mineral bioavailability in humans.”

3. The Health Benefits of Dietary Fibre

“The gut microflora functions as an important mediator of the beneficial effects of dietary fibre, including the regulation of appetite, metabolic processes and chronic inflammatory pathways.”

4. The Importance of Dietary Fiber for Metabolic Health

“Increased fiber intake was linked with lower total cholesterol, LDL cholesterol, triglycerides, body weight, and improved markers of metabolic health.”

5. Association of dietary fiber intake with all-cause and cardiovascular mortality in U.S. adults with metabolic syndrome.

"5 g/day increase in dietary fiber intake was associated with a 7% lower risk of all-cause mortality."

6. Beyond the gut: decoding the gut–immune–brain axis in health and disease

“SCFAs, which are produced primarily by microbial fermentation of dietary fiber, are essential regulators of innate and adaptive immunity.”

7. Role of brain-gut-muscle axis in human health and energy homeostasis

“SCFAs bind to receptors that help stimulate secretion of gut hormones like GLP-1 and PYY that communicate with the brain and influence appetite and energy balance.”

8. The gut-brain axis: interactions between enteric microbiota, central and enteric nervous systems

“One of the main products of bacterial metabolism are short-chain fatty acids (SCFAs)… that are able to stimulate … mucosal serotonin release and influence memory and learning processes.”
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Frequently Asked Questions

Fiber plays a foundational role in performance and longevity because it supports the systems that make everything else work.

The prebiotic fibers found in our 3-in-1 Fiber+ formula feed beneficial gut bacteria, which produce short-chain fatty acids (SCFAs) that strengthen the gut barrier and improve nutrient absorption. Soluble fiber helps stabilize blood sugar and energy, supporting metabolic health and insulin sensitivity over time.

Higher fiber intake is also consistently linked to lower risk of cardiovascular disease and all-cause mortality, yet most people don’t get enough daily. Supporting your fiber intake helps ensure your training, nutrition, and recovery efforts deliver their full return.

Yes. Fiber+ is designed to support consistent, comfortable digestion — even with a busy, high-performance lifestyle.

It combines soluble fiber (psyllium) to increase stool hydration and ease motility with insoluble fiber (rice bran) to add bulk and support smooth transit. Together, they promote regular bowel movements without harsh stimulants.

The addition of prebiotic resistant starch also supports microbiome balance, which can help reduce bloating and digestive discomfort over time. When used consistently and paired with adequate hydration, Fiber+ helps keep digestion steady so your schedule and your training stay uninterrupted.

Most people notice improvements in digestive regularity within 12–48 hours, especially if increasing overall fiber intake.

Full microbiome and metabolic benefits — including steadier energy and improved gut resilience — typically build over 1–4 weeks of consistent daily use.

As with any fiber supplement, hydration and consistency are key to getting the best results.

Yes. Fiber+ is designed for daily use as part of a consistent performance and longevity routine.

Dietary fiber is an essential nutrient, and most adults fall well below recommended daily intake levels, experts recommend 25-38 grams of fiber per day depending on age and sex. Supplementing helps close that gap in a reliable way.

Fiber+ contains soluble fiber, insoluble fiber, and prebiotic resistant starch — all well-studied forms of fiber — and is made to The Momentous Standard® with no unnecessary additives. For best tolerance, start with a smaller amount if you’re new to fiber and increase gradually while maintaining good hydration.

Yes — Fiber+ can be taken with most supplements and protein shakes as part of your daily routine.

Because soluble fiber slows digestion, it may slightly delay the absorption of certain nutrients — which is part of how it helps stabilize blood sugar and energy. For most vitamins and supplements like protein, creatine, and omega-3s, this is not a concern.

However, because soluble fiber can slow digestion and bind to certain compounds, it may reduce absorption of iron and some medications. To be safe, take fiber at least 2 hours before or after iron supplements or prescription medications unless your healthcare provider advises otherwise.

Yes, all of our products are third-party tested. But that’s not enough for us. That's why we created The Momentous Standard®: a higher bar for science, sourcing, and verification, backed by independent proof you can trust.

Every finished batch of Fiber+ is certified through NSF Certified for Sport®, a respected independent program that verifies label accuracy and screens for hundreds of banned substances. If a batch fails to meet these independent standards, it does not ship, because only third-party certification can truly back that promise. We also take transparency a step further by publishing third-party test results via Light Labs on individual product pages and making Certificates of Analysis (COAs) available for every batch.

We earn trust the hard way, by proving quality at every step, on every batch, with no shortcuts.

4.7
Rated 4.7 out of 5 stars
Based on 174 reviews
Total 5 star reviews: 147 Total 4 star reviews: 17 Total 3 star reviews: 6 Total 2 star reviews: 0 Total 1 star reviews: 4
94%would recommend these products
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Reviews Summary
Customers say this fiber supplement has excellent taste, especially the cinnamon flavor which many compare to cinnamon cereal or toast. Users find it mixes easily into smoothies, protein shakes, oatmeal, yogurt, and water without becoming gritty or clumpy. Many appreciate that it helps with regularity and keeps them feeling full longer. The unflavored version is described as tasteless and versatile. Some mention the powder can have small chunks or needs to be consumed quickly after mixing to avoid texture changes. Most users report positive digestive results within days or weeks of use.
Customers Talked About
Write a Review (Opens in a new window)
174 reviews
  • EM
    Elizabeth M.
    Verified Buyer
    4 minutes ago
    Reviewing
    Fiber+
    Rated 5 out of 5 stars
    Working

    Really

    Makes a difference with stomach issues

    Was this helpful?
  • MS
    Michael S.
    Verified Buyer
    Product Standouts Results, Taste + Texture, Ease of Use, Trust and Transparency
    2 days ago
    Product Standouts Results, Taste + Texture, Ease of Use, Trust and Transparency
    Reviewing
    Fiber+
    Rated 5 out of 5 stars
    Feeling full!

    I take it every day first thing in the morning. I didn’t think I’d enjoy taking a fiber supplement, but this one really has good flavor and not too grainy. I am on a GLP-1 and adding this supplement has only been a positive. Not only do I feel more full, it has spared me from a lot of the gastrointestinal side effects of the shots. I used to get a little bound up in the days after taking a shot. Now, I stay regular!

    Was this helpful?
  • DG
    David G.
    Verified Buyer
    Product Standouts Taste + Texture, Ease of Use, Results, Trust and Transparency
    2 days ago
    Product Standouts Taste + Texture, Ease of Use, Results, Trust and Transparency
    Reviewing
    Fiber+
    Rated 5 out of 5 stars
    Awesome!

    Awesome flavor, quality, and benefits!

    Was this helpful?
  • JW
    Jeremy W.
    Verified Buyer
    Product Standouts Taste + Texture, Trust and Transparency, Results
    4 days ago
    Product Standouts Taste + Texture, Trust and Transparency, Results
    Reviewing
    Fiber+
    Rated 5 out of 5 stars
    Clean Taste, Noticeable Results, and Improved Mixability

    I’ve been consistently using Momentous Fiber + powder and have been very pleased with the results. Since incorporating it into my routine, I’ve noticed a clear improvement in regularity, which was my primary goal.

    One of the standout features is the cinnamon flavor. It’s well-balanced and tastes natural—avoiding the overly sweet, artificial cinnamon profile that many supplements tend to have. It makes it easy to take daily without feeling like a chore.

    Initially, I did experience some minor issues with mixability, as the powder would occasionally clump when added to liquids. However, the updated formula has addressed this concern effectively. The powder now mixes much more smoothly, resulting in a better overall user experience. I add to post workout shakes or morning oatmeal or other cereals.

    Overall, this is a high-quality fiber supplement that delivers on both performance and taste. With the improved formulation, it’s an easy recommendation for anyone looking to support digestive health in a convenient and enjoyable way.

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  • GC
    Gerald C.
    Verified Buyer
    5 days ago
    Reviewing
    Fiber+
    Rated 5 out of 5 stars
    Already excellent results

    The Fiber+ has already helped my gut, etc so much. Trying not to be gross, but my stool is much less messy than before, I’m using half as much toilet paper/wipes after each BM.

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