GUT HEALTH

6 Reasons Your Gut Issues Are More Fixable Than You Think

Your gut affects how you feel after meals, how often you go, and even your mood. But chances are, you're lacking the one thing it needs to work properly—fiber. 

Core Fiber's diverse blend of prebiotic fibers helps your gut function the way it's supposed to—making digestion easier and more consistent, and giving you control back over your life. 

See the 7 Reasons ↓

16K+

5-Star Reviews

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760K+

purchases

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Developed by

Dr. Alex Carrasco

Functional Medicine MD

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100% NATURAL

GLUTEN FREE

3RD PARTY TESTED

NO SUGAR

NON-GMO

100% NATURAL

GLUTEN FREE

3RD PARTY TESTED

NO SUGAR

NON-GMO

100% NATURAL

GLUTEN FREE

3RD PARTY TESTED

NO SUGAR

NON-GMO

100% NATURAL

GLUTEN FREE

3RD PARTY TESTED

NO SUGAR

NON-GMO

01

Effortless, Complete Bowel Movements (Daily)

No more straining. No more skipping days. No more "almost." Insoluble fiber and resistant starch help add bulk and structure to your stool, while soluble fiber helps retain water—creating stools that are soft, well-formed, and easy to pass. So you can go consistently, completely, and comfortably… without thinking about it.

95% felt more energy

Clinical Trial

02

No More Feeling "Stuck" Or Not Finished

You know the feeling—you go, but it doesn't feel like you're actually done. That's often a fiber quality problem, not just a fiber quantity problem. Different fibers play different roles in how waste moves through your gut. Insoluble fiber helps move things along, while fermentable fiber helps your gut stay regular—so things don't get stuck or backed up. When you combine these fiber types, waste efficiently moves through your system—so you actually feel clear, light, and finish

95% felt more energy

Clinical Trial

03

Less Bloating & Gas

Bloating isn't just about what you eat it's also about what isn't moving. When digestion isn't flowing the way it should, food can linger in your gut—creating gas buildup and uncomfortable pressure. Slowly fermenting prebiotic fibers like acacia fiber, along with resistant starch from green bananas and potatoes, help support gentle fermentation while improving transit time. The result: less gas buildup, less pressure, and a flatter, more comfortable stomach.

95% felt more energy

Clinical Trial

WHAT SCIENTISTS SAY

“For GLP-1 patients losing nutrients through reduced eating, a comprehensive all-in-one formula is exactly what I recommend over individual supplements.”

Dr. Dawn Mussallem

CMO, Fountain Life · Founder, Mayo Clinic Integrative Breast Oncology Program

04

Natural Detox That Actually Balances Your Hormones

If you aren't pooping, you aren't detoxing. Waste, toxins, and excess hormones are meant to be eliminated through regular bowel movements. When digestion slows down, those compounds can linger, and even be reabsorbed. Insoluble fiber helps move waste out efficiently, while fermentable fiber supports the good gut bacteria involved in processing and eliminating these harmful compounds.

95% felt more energy

Clinical Trial

05

Healthier Microbiome = Lasting Digestive Improvements

Most fiber supplements are only designed to act as laxatives. Prebiotic fiber is what actually fixes the system at the source. Fermentable fibers like chicory root inulin, acacia fiber, and resistant starch feed beneficial gut bacteria, which produce short-chain fatty acids (SCFAs)—key compounds that improve digestion, reduce inflammation, and strengthen the gut lining. Better bowel movements aren't just the result—they're the signal your gut is getting healthier.

95% felt more energy

Clinical Trial

WHAT CUSTOMERS SAY

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06

High-quality Fiber That Mirrors A Whole Foods Diet

Fiber isn't just about how much you get—it's about the type and diversity of fiber you're consuming. Different whole foods contain different types of fibers – soluble fiber, insoluble fiber, fermentable fiber, and resistant starch – with each playing a different role in digestion and gut health. But most people's diets—and most fiber supplements—only provide one or two of these. That's why you can still feel constipated, bloated, or irregular, even if you're already getting a lot of fiber in your diet. A diverse blend of high-quality fibers helps replicate what your body is designed to receive from a whole foods diet—supporting stool formation, digestion, and a healthier microbiome. That's the difference between taking fiber…and actually fixing your gut.

95% felt more energy

Clinical Trial

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760,000+ customer purchases. Join the people who've made IM8 part of their daily routine. Subscribe today and save 30% on your first order.

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90-Day Happiness Guarantee

CORE FIBER STARTER KIT

Complete Prebiotic Fiber Supplement

A prebiotic fiber system that goes beyond keeping you regular – for long-term gut health & full body benefits.

5 PREBIOTIC INGREDIENTS

SOLUBLE + INSOLUBLE FIBER

3rd Party Tested

Flavor:

Unflavored
Strawberry Kiwi

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How to Enjoy

3 SIMPLE STEPS

Mix one scoop into water or your favorite smoothie for a delicious açai berry boost — ready in under 30 seconds.

Step 1

Scoop one serving

Step 2

Scoop one serving

Step 3

Scoop one serving

THIRD PARTY TESTED

NON GMO

MADE IN USA

Vegan

Allergen-Free

Gluten-Free

No artificial flavors

No added sugar

No artificial sweeteners

THIRD PARTY TESTED

NON GMO

MADE IN USA

Vegan

Allergen-Free

Gluten-Free

No artificial flavors

No added sugar

No artificial sweeteners

THIRD

PARTY

TESTED

NON

GMO

MADE

IN

USA

Vegan

Allergen-Free

Gluten-Free

No artificial flavors

No added sugar

No artificial sweeteners

Real People. Lasting Results.

Most gut products only treat symptoms

Ours works atthe core

Fiber/Serving

Calories/Serving

Sugar/Serving

Fiber diversity

Prebiotic fiber

Soluble + insoluble fiber

Resistant starch

Gut breakdown speed

Artificial ingredients

Core Fiber

6g

15

0g

5 types

100%

Slow & gentle

None

Most fiber powders

2–3g

25–40

3–5g

1 type

Minimal

Fast & uneven

Sometimes

Fiber gummies

2–4g

30–40

3–6g

1–2 types

Minimal

Minimal

Often

Customer Reviews

Based on 99 reviews
89%
(88)
7%
(7)
0%
(0)
2%
(2)
2%
(2)
R
Renee Wood
This drink is absolutely delicious

This drink is absolutely delicious. Not clumpy or thick and the flavor doesn’t leave a weird aftertaste like others do .

D
Deborah Allen
I LIKE IT!!!

I have noticed healthier bowell movements but no gas or stomach issues

A
Anonymous
I’ve used all kinds of products for my gut health

I’ve used all kinds of products for my gut health. This is the firsttime that a product really works. I am regular no bloating. It just works. I’m glad I seen the little video about this product. Very happy. I will buy it again.

S
Scott

Tastes great

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