Fiber+ Exclusive
30 Servings Per Container: $0.99/Serving
Exclusive first-batch offer of our new complete fiber supplement for Pump Club members: only 500 available
- Comprehensively targets gut health
- Soluble and insoluble fibers + resistant starch
- Digestion, gut microbiome diversity, and energy
More than just fiber, Fiber+ targets comprehensive gut health
A blend of soluble and insoluble fibers, including psyllium husk, plus resistant starch to support comfortable + regular digestion, gut microbiome diversity, and steady energy.
In a category that hasn’t seen evolution in decades, we’re introducing a new kind of gut health formula: one containing both soluble and insoluble fibers in addition to resistant starch, for a truly comprehensive approach to gut health that can keep up with high performance demands.
- Complete Digestive Support
The comprehensive combination of soluble fiber, insoluble fiber, and resistant starch promotes digestive regularity without bloating or discomfort.
- Full-Spectrum Gut Health
Resistant starch acts as a prebiotic to feed healthy gut bacteria, which in turn support the production of short-chain fatty acids (SCFAs) that strengthen the gut barrier and promote long-term gut and metabolic health.
- Steady + Stable Energy
Helps maintain balanced blood sugar levels throughout the day, with no spikes or crashes, for steady and stabilized energy.
- Made to The Momentous Standard™
Fiber+ is made without unnecessary additives or artificial or natural flavors. The Pure Cinnamon flavor system uses only real Cinnamon Bark Powder and Reb M (a natural sweetener).
Supports Digestive Regularity and Comfort
Psyllium husk and rice bran work together to promote healthy digestive function. Soluble fiber from psyllium forms a viscous gel that increases stool hydration and eases motility, while insoluble fiber from rice bran adds bulk for smoother transit. Together, they help reduce occasional bloating and constipation and support regular, comfortable digestion.
Contributes to a Diverse Gut Microbiome
Resistant potato starch acts as a clinically validated prebiotic that escapes digestion in the small intestine. Once in the colon, the starch is fermented by beneficial bacteria into short-chain fatty acids (SCFAs) like butyrate—a key energy source for intestinal cells that strengthens the gut barrier and fosters microbial diversity. Studies show Solnul™ resistant potato starch increases Bifidobacterium and Akkermansia abundance and enhances digestive comfort.
Helps Maintain Steady Energy and Blood Sugar
Soluble fibers, like the ones in Fiber+, slow the breakdown and absorption of carbohydrates, reducing post-meal glucose spikes and preventing rapid energy drops. Meanwhile, the SCFAs produced from the resistant potato starch fermentation improve insulin sensitivity and overall metabolic efficiency. Together, these actions support steadier energy and more balanced blood sugar throughout the day.
Mix 2 scoops (6g fiber) with at least 12–16 fl oz of liquid daily. Can be added to water or your protein shake. Drink shortly after mixing to maintain texture.
If you’re new to fiber, start with 1 scoop for the first few days, then increase to the full serving as tolerated.
To support absorption, take Fiber+ at least 2 hours before or after medications. Adequate fluid intake is important when using fiber supplements.
*Experts recommend a daily fiber intake of 22–34 grams, depending on age and body composition.Consult a healthcare professional if pregnant, nursing, taking medication, or if you have a medical condition.
Pure Cinnamon: Psyllium Husk, Resistant Potato Starch (Solnul®), Rice Bran Hull
Other Ingredients: Maize Starch, Cinnamon Bark Powder, Sunflower Lecithin, Reb M*
Unflavored: Psyllium Husk, Resistant Potato Starch (Solnul®), Rice Bran Hull
Other Ingredients: Maize Starch, Sunflower Lecithin
*Reb M is a natural, plant-based sweetener with zero glycemic response or aftertaste. Our Reb M is made from fermented sources 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+ daily to support regularity and gut health — morning, before meals, or in the evening all work. Whenever is most consistent for your schedule.
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 5 credible reviews and studies related to this product:
3. The impact of diet and lifestyle on gut microbiota and human health
- 20g of clean protein per serving
- Limited-run flavors. No artificial sweetners
- NSF Certified for Sport®
Whey Protein Isolate - Flavor Series
Whey Protein Isolate - Flavor Series
- New Signature Spec creatine standard
- Ultrafine powder for exceptional mixability
- Unrivaled 6-stage testing & certification
Creatine - 90 Servings
Creatine - 90 Servings
- 1g of clinically proven creatine per chew
- Enhances cognitive function & ATP production
- Supports lean muscle growth, endurance, and recovery
Creatine Chews 150-Count
Creatine Chews 150-Count
- Supports calcium absorption for bone strength and muscle function
- Promotes immune health and inflammation balance
- Delivered in organic extra virgin olive oil for superior bioavailability
Vitamin D3 2000 IU
Vitamin D3 2000 IU
- Supports brain, heart, and joint health with no fishy aftertaste
- Aids recovery and reduces inflammation from training or stress
- Norweigen sourced + tested for heavy metals and purity
Omega-3
Omega-3
Frequently Asked Questions
Momentous Fiber+ was designed in partnership with Arnold Schwarzenegger’s Pump Club for those pursuing Performance for Life™. In celebration of the partnership, we wanted to offer a first batch exclusive of our Fiber+ prototype to Pump Club members to try before the general public. In an effort to provide exclusive access as soon as possible, we shipped this prototype straight from the production line.
Professional athletes should note this prototype version has NOT YET been NSF Certified for Sport®.
Adequate fiber supports gut health, nutrient absorption, sustained energy, metabolic stability, and long-term digestive resilience—all essential for maintaining high performance as you age.
Yes. Consistent fiber intake helps keep your system moving smoothly, even when travel, training, stress, or inconsistent meals might otherwise disrupt digestion.
Take Fiber+ daily to support regularity and gut health - morning, before meals, or in the evening all work. Whenever is most consistent for your schedule.
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.
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.
If you want targeted effects:
- Before meals can support fullness and steadier post-meal energy
- With meals or shakes makes it easiest to build a habit
- Anytime of day is effective for gut health and regularity
Fiber+ is gentle enough for an empty stomach, and the microbiome benefits build with daily use, not specific timing.
Fiber is foundational nutrition. Daily intake mirrors what your body expects from a high-quality diet and helps maintain long-term digestive and metabolic health.
Yes, Fiber+ mixes well with protein, creatine, and most supplements, and normal daily fiber intake doesn’t block nutrient absorption. You can take it alongside your morning stack or add it directly to your shake.
If you’re new to fiber or have a sensitive stomach, you can start with 1 scoop for the first few days, then increase to the full serving.
For habit-building, pair Fiber+ with an existing routine cue like pouring your morning water, making a shake, sitting down to breakfast, or evening routine — whatever helps you take it daily.
As a celebration of the Momentous x Arnold’s Pump Club partnership, we wanted to give a first batch exclusive of our Fiber+ prototype to Pump Club members so they can try the formula before it launches to the general public. As a result of wanting to give exclusive access as soon as possible, we shipped this prototype straight from the production line. The NSF Certified for Sport® process takes an additional 4-6 weeks.
Professional athletes should note this prototype version has NOT YET been NSF Certified for Sport®.
- Taste
- Mixability
- Effectiveness
- Digestion
- Satiety
- BBrendanYesterdayReviewingFiber+Rated 5 out of 5 stars5 Stars
Enjoy the cinnamon flavor, always refining the product to be the beat and healthiest.
- J(Joan (. L.Verified Buyer4 days agoReviewingFiber+Rated 5 out of 5 starsFiber
Love the taste. Love the cinnamon. Love the way my body metabolizes this fiber. Can’t imagine ever doing anything different.
- RJRebecca J. C.Verified BuyerProduct Standouts Taste + Texture, Ease of Use, Trust and Transparency4 days agoProduct Standouts Taste + Texture, Ease of Use, Trust and TransparencyReviewingFiber+Rated 4 out of 5 starsTasty
I find the fiber+ cinnamon flavor very good. It doesn’t mix thoroughly, but I usually drink it it down as my 8 ounces of water to begin the day so the consistency of the liquid doesn’t bother me a bit. I’m hitting my fiber intake and it tastes good!
- GJGinny J.Verified BuyerProduct Standouts Taste + Texture, Trust and Transparency, Ease of Use, Results1 week agoProduct Standouts Taste + Texture, Trust and Transparency, Ease of Use, ResultsReviewingFiber+Rated 5 out of 5 starsLove this stuff!
Tastes great, mixes well. I mix this in with my protein shake. Great way to get some extra fiber in.
- MBMichael B.Verified BuyerProduct Standouts Taste + Texture, Ease of Use, Results, Trust and Transparency1 week agoProduct Standouts Taste + Texture, Ease of Use, Results, Trust and TransparencyReviewingFiber+Rated 5 out of 5 starsBest Fiber in the game!!
I’ve tried a few different fiber types and brands over the years and this by far is the best product out there. Saw improvements almost immediately, which never happens in the digestive realm. Since I’ve been on this product I’ve had no issues and feel amazing. Wish I had this product years ago!
