The Gut-Glucose Connection

Who Is This Doctor and Why Should You Listen to What He Has to Say

My name is Brian Karaan.

I grew up in a suburb of Minneapolis watching my father work 14-hour days at a convenience store. I learned that the answer to any problem was to study harder, work harder, and trust the system.

So I did.

I got into the University of Minnesota medical school. Did my residency at the Mayo Clinic in Rochester, Minnesota — one of the most respected medical institutions in the world. Opened my practice in Denver, Colorado in 2001. Married Sarah. Had our son Daniel.

Life was exactly what I had planned.

For six years I sat across from patients with type 2 diabetes and delivered the same honest, well-intentioned, and — as I would later discover — completely incomplete answer.

Metformin. Dietary changes. Monitor your numbers. Come back in three months.

I believed what I was saying. I had trained at the Mayo Clinic. I had followed the protocol. I was doing everything right by every measure I had been given.

Then in 2004 I went hiking the Grand Canyon with my 8-year-old son.

A small cut on a rock turned into an infection. The infection turned into an emergency rescue. The rescue turned into an amputation below my right knee.

I woke up in a hospital in Arizona without part of my leg.

And with a question I had never asked in six years of practice.

Not "how do I manage this." But "why does this exist."

That question changed everything. Not just for me. For the more than 4,000 patients I treated in the 22 years that followed.

This ebook is what I wish someone had handed me before that rescue.

— Dr. Brian Karaan, MD

What Your Doctor Told You — and What He Left Out

Let's start with what you already know.

You have type 2 diabetes or pre-diabetes. Your doctor told you that your body isn't processing glucose properly. Your pancreas either doesn't produce enough insulin or your cells have stopped responding to it — what medicine calls insulin resistance.

You were given one or more of the following: Metformin. Ozempic. Mounjaro. A meal plan. A glucose monitor. A prescription to exercise more and eat less sugar.

And you're still here.

Still monitoring. Still managing. Still living inside a disease your doctor told you has no cure — only control.

You're not wrong to question that.

Because what you were told isn't false. It's incomplete. And incomplete information about a chronic disease isn't neutral — it keeps you managing something that could be addressed at the root.

Here's what the standard explanation left out.

Your pancreas doesn't operate alone. It operates as part of a communication system. And the organ that sends the most critical signals in that system — the organ that tells your pancreas how much insulin to produce, when to produce it, and how sensitive your cells should be to it — is not your pancreas.

It's your gut.

Every medication you've taken was aimed at the wrong end of the call.

The problem was never your pancreas. The problem was always your gut. And nobody was treating the gut.

The Organ That Controls Everything — and That Nobody Was Treating

Your gut contains approximately 100 million neurons.

More than your spinal cord. More than any other organ in your body outside of the brain. So many that the gut is known as the body's second brain.

It also contains between 38 and 100 trillion bacteria — a community so complex and so influential that researchers now call it a separate organ within the body. That community is called the gut microbiome. And its relationship with your blood sugar is not peripheral or secondary.

It's central.

Here's the mechanism in plain language.

Specific bacterial strains in your gut produce compounds called short-chain fatty acids. These compounds do several things at once — they reduce inflammation in the intestinal wall, regulate how much glucose is absorbed into your bloodstream after a meal, and send chemical signals directly to your pancreas that determine insulin production and cellular sensitivity to insulin.

When those bacterial colonies are healthy and abundant, the system works. Your blood sugar rises after a meal and returns to normal. Your cells respond to insulin correctly. Your pancreas produces what's needed and rests when it's not.

When those bacterial colonies collapse — from antibiotics, processed foods, chronic stress, or years of metabolic inflammation — the signal breaks. Your pancreas keeps producing insulin. Your cells stop responding. Your blood sugar rises and stays elevated.

Your doctor sees the result on a blood test and calls it insulin resistance.

What it actually is — at the root — is a broken communication line between your gut and your pancreas.

And no medication currently prescribed for type 2 diabetes fixes a broken communication line by targeting the wrong end of the call.

The Woman Who Discovered This Before Harvard — and Was Fired for It

After the amputation I spent months asking the question no medical school had taught me to ask.

Not how to treat the symptoms. But what actually causes this.

The answer wasn't in conventional papers. It wasn't at the medical conferences I attended. It was in a German microbiologist named Dr. Eva who had spent decades studying what conventional medicine chose to ignore.

Dr. Eva had discovered the gut-glucose connection before any major study was published. She had mapped the three specific failures in the gut microbiome that precede the development of type 2 diabetes. She had developed a protocol based on natural compounds that addressed all three failures simultaneously.

And she had been fired the day after presenting her data.

The research team she worked with was funded by pharmaceutical companies. What she had discovered couldn't be patented. Couldn't be sold for $900 a month. It wasn't in the interest of anyone with money to act.

So they acted the only way they could. They silenced her.

Dr. Eva moved to Boulder, Colorado. She continued researching alone for years while the academic world pretended she didn't exist.

I drove 45 minutes from Denver to Boulder at five in the morning to knock on her door. She was in the garden picking plants with the calm of someone who's in no hurry for anything. She looked at me for a second — like someone recognizing a person they hadn't met yet. And waved me in.

What I learned that morning changed everything I thought I knew about diabetes.

What Harvard confirmed with 8,000 patients in 2024 — Dr. Eva knew in 2004.

What Harvard Proved — and Why Your Doctor Still Doesn't Know

In 2024 researchers from Harvard T.H. Chan School of Public Health, the MIT Broad Institute, and Brigham and Women's Hospital published the largest gut microbiome study ever conducted in adults with type 2 diabetes.

They analyzed 8,000 people.

The conclusion was direct and unequivocal.

The changes in the gut microbiome happen first. Type 2 diabetes develops after. Not the other way around.

The bacterial collapse in the gut precedes diagnosis — sometimes by years, sometimes by decades. By the time a patient sits across from a doctor with an A1C of 7.5, their gut microbiome was already compromised long before.

The blood sugar number is not the beginning of the problem. It's the end result of a process that started in the gut.

This was published in Nature Medicine — one of the most respected scientific journals in the world.

So why hasn't your doctor told you this?

The answer has three parts.

Your doctor is not your enemy. He's working within a system that was not designed to ask the right question.

The Three Things Your Gut Lost

When I began studying the gut-glucose connection with Dr. Eva, we identified three specific failures that occur in the gut microbiome of virtually every patient with type 2 diabetes.

These three failures are the origin of your insulin resistance. Not your genetics. Not your lack of discipline. Not your pancreas.

Three specific bacterial failures that developed over years. And that can be reversed.

These three failures didn't happen overnight. They developed over years of antibiotics, processed foods, chronic stress, and metabolic inflammation.

And they can be reversed. But only if you address all three simultaneously in the right sequence with the right compounds.

The 3-Day Reset

Before introducing the full protocol I give every new patient a 3-day reset.

The purpose is not to reverse years of damage in 72 hours. The purpose is to stop actively destroying what we're about to rebuild — and give the gut its first signal that something is changing.

Follow this for 3 days exactly as written.

If you notice these signals within 3 days it means the gut was waiting for that signal. The system isn't broken. It's hungry for the right thing.

GutGlucose — The Protocol

The 3-day reset is the beginning. But rebuilding the gut microbiome fully and sustainably requires more than dietary changes.

Over 22 years of practice I tested dozens of combinations of natural compounds across the three failure points we identified with Dr. Eva.

What I discovered is that the delivery method matters as much as the compounds themselves. That's why GutGlucose was formulated in targeted-release capsules — designed to pass through the stomach intact and release the compounds directly in the gut, where they need to act.

GutGlucose is the formulation I developed based on 22 years of clinical research. It contains the three compounds that address all three failures simultaneously.

What to Expect and When

Based on 22 years of clinical practice with over 4,000 patients, here is the honest timeline of what the full protocol produces.

The gut that collapsed over years doesn't rebuild in a week. But it does rebuild.

You've Been Managing. It's Time to Reverse.

For 22 years I kept the Diabetes Protocol inside my practice in Denver.

4,000 patients. Referrals only. Six-month waitlist. And results that my colleagues kept asking to understand because they weren't asking the same question I had started asking since that hospital in Arizona.

I watched A1Cs that hadn't moved in a decade finally begin to drop. I watched patients get calls from their own doctors asking what they were doing differently. I watched 65-year-old men sit in that office chair with tears in their eyes saying — "I feel like myself again."

That's not a side effect of a medication. That's what happens when you fix the root cause.

You were diagnosed and given a lifelong management sentence. You were given a protocol that assumes the goal is to coexist with the disease — not to remove the conditions that allow it to exist.

I rejected that premise in a hospital in Arizona in 2004.

You're reading this ebook because some part of you is rejecting it too.

This ebook gave you the mechanism. It gave you the science. It gave you the 3-day reset to start today. It gave you the product that delivers the three compounds directly where they need to act.

What it can't give you is the full protocol — the 27 lessons divided into three phases, the weekly checklists personalized for your symptoms, the guidance on how to read your own lab results, the dietary instructions by phase, and direct access to me when you have a question that matters.

That's what the Diabetes Reversal Club is for.

A private community where you get access to the full protocol, guided tracking of your progress, a community of people on the same path, and a doctor who responds personally when you need a real answer.

If you're ready to stop asking "how do I manage this" and start asking "what's causing this" — I'm ready to answer.

The gut that collapsed over years doesn't rebuild overnight. But it does rebuild. I've seen it hundreds of times.

— Dr. Brian Karaan, MD

Functional Medicine Physician · Denver, Colorado

Mayo Clinic Trained · 28 Years of Practice · 4,000+ Patients