FIBER — THE MOST IMPORTANT NUTRIENT YOU’RE NOT GETTING ENOUGH OF & ENDORSED BY EXPERTS FROM:
4.9
Be more than regular.
Daily Fiber that Fuels Your Goals
Forget the gimmicks—no magic pills, no detox fads. Just scientifically-formulated fiber powder, tailor-made for active lifestyles.
Improve digestion & regularity
Sustain energy levels
Fuel lean muscle and fat loss
Enhance nutrient absorption
Daily Fiber Intake
Women
25g
Men
38g
10g
Recommended
(National Academy of Medicine)
AVG. AMERICAN
America has a fiber problem
Fiber deficiency is practically universal.
95% of Americans don’t get enough fiber.
A lack of fiber disrupts your gut, saps your energy, and promotes fat storage and inflammation.
Fiber for People Who
Get S**t Done
Your gut is your second brain, regulating digestion, metabolism, energy, and mood. Our scientifically-formulated prebiotic fiber feeds your gut so you can thrive.
Smooth & Regular Digestion
Balances stool consistency & helps eliminate gut issues like bloating and constipation.
Consistent Energy, No Crashes
Helps prevent blood sugar crashes & reduces insulin spikes for sustained, all-day energy.
Control Hunger, Build Lean Body Mass
Regulates appetite & improves your body's ability to burn fat while preserving muscle.
Maximize Nutrient Absorption
Slows digestion, giving your body more time to extract & utilize vitamins, minerals & amino acids.
Get Your DAILY Core Fiber
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Core Fiber is for those looking for more than “just staying regular.” It’s fiber for doers. Those who are active, busy, and want more out of life.
More Fiber, More Support:
Each serving delivers 6g of fiber—more than most powders or gummies—so you get real digestive support you can feel.
Soluble & Insoluble Fiber:
Core Fiber includes both types of fiber your body needs. Soluble fiber feeds your gut microbes and supports smoother digestion. Insoluble fiber helps keep everything moving—naturally and effectively.
Built for Real Life:
Whether you’re lifting, working, parenting, or all of the above, Core Fiber fits right in. It supports digestion, nutrient absorption, and all-day energy—so you can feel lighter, stronger, and more balanced.
Clean, Easy, Effective:
No artificial flavors. No fillers. Just a gut-friendly blend that mixes fast, tastes great, and actually works.
Core Fiber is made with a blend of five all-natural, plant-based fibers selected for their digestive benefits and gut-friendly profile. These include: resistant potato starch, chicory root inulin, acacia fiber, green banana powder resistant starch, and oat beta glucan.
Core Fiber contains:
- NO sugar
- NO artificial ingredients
- NO soy
- NO dairy
- NO GMOs
It is also vegan and keto-friendly.
Science
Fiber is one of the most well-studied and widely recommended nutrients in human health, with thousands of clinical studies supporting its role in digestion, microbiome health, metabolic function, and even skin clarity and immune support. Core Fiber is formulated in collaboration with leading PhDs and MDs to deliver the most effective types and forms of fiber—no filler ingredients, no gimmicks, just results rooted in science.
Third Party Testing
Our products undergo rigorous testing to ensure quality and purity. Eurofins Scientific, a global leader in laboratory testing, verifies that Core Fiber meets all label claims and passes contaminant screenings for pesticides, heavy metals, and microbial contaminants.
Certifications
Manufactured in SQF, GMP, and FDA certified facilities in the U.S., and thoroughly tested for heavy metals and contaminants.
Core Fiber is unflavored and uses all-natural ingredients. It has a mild, slightly sweet and nutty taste, and is designed to mix easily into water, smoothies, or shakes—no grit, no weird aftertaste.
Mix one scoop with 8-12 oz of water or your favorite beverage (or food!) daily. For best results, take it consistently—ideally around the same time each day. Increase to 2-3 scoops daily for maximum effect.
New to fiber? Start with half a scoop for the first 4 days to let your body adjust, and make sure you’re drinking plenty of water.
Poop better: Supports smoother, more regular digestion.
Less bloating: Helps you feel lighter and less gassy.
More energy: Helps stabilize blood sugar and maintain consistent, steady levels.
Fewer cravings: Supports appetite regulation and healthy eating habits.
Support lean body mass: Complements high-protein diets and active lifestyles
Word On The Street
No additives. Just fiber that works harder than your spin class.
Our ActiveFiber prebiotic blend contains 5 powerful soluble & insoluble fiber strains that work together to nourish your gut.
Green Banana Resistant Starch
Acacia Fiber
Oat Beta Glucan
Chicory Root Inulin
Resistant Potato Starch
The Stats That Matter
Superior Fiber for Superior Results
Core Fiber™ isn’t for those who want to blend in or who are okay with being average. We’re here for the doers, the strivers, the unapologetically ambitious.
Fiber (g)
6
3
3
4
2
Fiber Strains
5
1
1
1
3
Sugar Free
Dual-Action Fiber
Resistant Starch
SWIPE TO COMPARE
Add Core Fiber.
Feel the difference.
Core Fiber™ blends seamlessly into your daily routine—whether you stir it, shake it, or blend it.
WATER
SMOOTHIES
COFFEE
OATMEAL
OUR SCIENTIFIC ADVISORY BOARD
Gut Microbiome + Performance Nutrition Experts
Dr. Alex Carrasco, MD
Nutrition, Integrative & Functional Medicine
Dr. Ava Mainieri, PhD
Dir. of Clinical Outcomes at Midi Health
Dr. Keith Garleb, PhD
Abbott Labs, Center for Nutrition
Amanda Carlson-Phillips, RD, CSSD
Chief Performance Innovation Officer at Exos
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We're fast! Orders typically ship within 24 hours and on average arrive 2 days later. You could be experiencing the amazing health benefits just 3 days from now.
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Each bottle comes with 30 servings of Core Fiber plus a measuring scoop. We recommend ordering on subscription. You get better pricing, and we'll make sure you're always stocked up so you never miss a day.
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While the timeline for experiencing the benefits of Core Fiber can vary from person to person, most people generally start to feel the effects within 1-2 hours. After 1-2 weeks of consistent daily use, you should experience noticeable health benefits. Continued consistent daily use is essential for long-term results.
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We want you to have the best experience with Core Fiber. Returns rarely happen, but we do have a great policy in place. You can return any unopened bottles within 30 days of your first order for a refund or exchange. For all refund requests, you will receive the full value of your order, less $5 return shipping. Submitting a return is easy, and we accept all returns in policy. No questions asked. If you have specific questions for your returns or exchange circumstance, our Support team is happy to help! You can reach them at help@corefiber.co. This policy applies only to your initial purchase.