DIETARY FIBER – ENDORSED BY EXPERTS FROM:
The Only Daily Fiber
For Whole Body Health
Helps regulate digestion and stool formation.
Regular BMsLess bloatingLess gas
Feeds the beneficial bacteria in your gut.
Improved digestionBetter moodHealthier skin
Supports balanced blood sugar and energy levels.
Steady energyLower cholesterolFewer cravings
Helps regulate digestion and stool formation.
Feeds the beneficial bacteria in your gut.
Supports balanced blood sugar and energy levels.
CORE FIBER STARTER KIT
4.8/5 (4,847 reviews)
Flavor:
BEST IN
CORE FIBER
Subscription
$59.99
Fiber Deficiency:
A Modern Epidemic
Over 95% of people don’t get enough fiber.
When fiber is missing, digestion suffers, energy drops, cravings rise, and metabolism slows.
Prebiotic fiber is the biggest missing piece of the modern diet.
Your gut needs soluble and insoluble fiber. And you need fiber from multiple sources.
The challenge? Getting enough prebiotic fiber from food alone is hard. It requires a daily diet that includes a wide range of fruits, vegetables, legumes, and whole grains.
Core Fiber makes it easy to get the diverse, prebiotic fiber your gut needs — supporting long-term gut health and whole-body benefits.
Fiber Deficiency:
A Modern Epidemic
Daily Fiber Intake
*Average of National Academy of Medicine’s recommendation for men (38g) and women (25g)
**Based on 1-2 serving of Core Fiber, plus typical diet
Clinically-Studied Ingredients
5 Prebiotic Fibers. 1 Complete Gut Solution.
Different fibers do different jobs. Our ActiveFiber Blend combines multiple prebiotic ingredients to support digestion, metabolism, and energy—not just regularity.
Green Banana Resistant Starch
Fuels beneficial gut bacteria deep in the colon.
Healthier microbiome
Better digestion
Gut–brain support
Acacia Fiber
Feeds good gut bacteria and supports digestive comfort.
Less bloating
Improved regularity
Easier digestion
Oat Beta Glucan
Slows digestion to support metabolic and heart health.
Lower cholesterol
Steadier energy
Stable blood sugar
Chicory Root
Inulin
Promotes regularity and gut balance.
Regular BMs
Reduced gas
Gut balance
Resistant
Potato Starch
Supports insulin sensitivity and natural GLP-1 production.
Fewer cravings
Metabolic support
Energy stability
Green Banana Resistant Starch
Fuels beneficial gut bacteria deep in the colon.
Healthier microbiome
Better digestion
Gut–brain support
Acacia Fiber
Feeds good gut bacteria and supports digestive comfort.
Less bloating
Improved regularity
Easier digestion
Oat Beta Glucan
Slows digestion to support metabolic and heart health.
Lower cholesterol
Steadier energy
Stable blood sugar
Chicory Root
Inulin
Promotes regularity and gut balance.
Regular BMs
Reduced gas
Gut balance
Resistant
Potato Starch
Supports insulin sensitivity and natural GLP-1 production.
Fewer cravings
Metabolic support
Energy stability
WHAT TO EXPECT WITH DAILY USE
DAY 7
Fiber is improving stool consistency, helping digestion move smoothly.
- Easier poops
- More regular BMs
- Gentler digestion
Day 14
Prebiotic fermentation increases, reducing gas buildup and helping normalize digestion.
- Less bloating
- Less gas
- Fewer cravings
30 Days +
A healthier gut microbiome begins supporting energy balance and the gut–brain connection.
- Steadier energy
- Better mood
- Improved nutrient absorption
90 Days +
Long-term gut support starts influencing metabolism, immunity, and overall health.
- Healthier cholesterol
- Stronger immune function
- Metabolic health support
DAY 7
Fiber is improving stool consistency, helping digestion move smoothly.
- Easier poops
- More regular BMs
- Gentler digestion
Day 14
Prebiotic fermentation increases, reducing gas buildup and helping normalize digestion.
- Less bloating
- Less gas
- Fewer cravings
30 Days +
A healthier gut microbiome begins supporting energy balance and the gut–brain connection.
- Steadier energy
- Better mood
- Improved nutrient absorption
90 Days +
Long-term gut support starts influencing metabolism, immunity, and overall health.
- Healthier cholesterol
- Stronger immune function
- Metabolic health support
Most Gut Products Only Treat Symptoms
Ours Works at the Core
Scroll to see the full table →
Core Fiber
Leading Fiber Supplements
Laxatives
Probiotics
Short-term symptom relief
Supports regular BMs
Reduces bloating & gas
Supports gut microbiome balance
Feeds beneficial gut bacteria
Energy & metabolic support
Risk of dependence
Gut Microbiome + Performance Nutrition Experts
Our Scientific Advisory Board
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 Phillips, RD, CSSD
Chief Performance Innovation Officer at Exos
FAQs
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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.