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The Real Root Causes of IBS (Most Doctors Miss At least One)

Dr Stephen Wangen
|
January 15, 2026

If you’ve been told you have IBS but no one can tell you why — this is for you 💡

If you’ve been told you have IBS but no one can tell you why — this video is for you.
IBS isn’t random. There are real causes behind it, and most people never have all of them looked at.

I want to start by saying something important 💛

If you’ve been struggling with IBS for years, it’s not because you’re complicated, broken, or doing something wrong.

It’s usually because one or more root causes were missed.

Today I want to walk you through the main underlying causes of IBS that we see in our patients every single day — and why so many people never fully get better.

IBS Is Not One Condition 🧩

IBS is not a disease in the way people think of diseases.

It’s a pattern of symptoms:

  • 💨 Bloating
  • 🤕 Pain
  • 🚽 Diarrhea
  • 🪨 Constipation
  • 🔄 Or some combination of those

But symptoms don’t tell you why something is happening.

In our clinic, IBS is never the final diagnosis.
It’s the starting point.

Our job is to figure out what’s actually driving your symptoms.

Root Cause #1: Food reactions 🍽️

This is one of the most common and most misunderstood causes of IBS.

And no — I’m not just talking about lactose intolerance or gluten.

Many of our patients react to foods in ways that don’t show up on standard allergy tests.

These reactions can cause:

  • 🔥 Inflammation
  • 🔄 Motility changes
  • 🤕 Pain
  • 💨 Bloating
  • 🚽 Loose stools or constipation

People often say:

“I eat the same food and sometimes I’m fine, sometimes I’m not.”

That’s a huge clue.

When food reactions are identified and handled correctly, symptoms can improve dramatically — and often much faster than people expect.

Root Cause #2: Microbiome imbalances 🦠

Your gut is home to trillions of bacteria.

When that balance is off, digestion doesn’t work the way it’s supposed to.

This can show up as:

  • 💨 Gas and bloating
  • 🔄 Changes in stool
  • 🤕 Pain after eating
  • ⏱️ Feeling full too quickly

This category includes things like:

  • Bacterial overgrowth
  • Dysbiosis
  • Post-infectious changes

And this is where many people are told they have SIBO.

Sometimes SIBO really is part of the picture, and unfortunately it’s often not treated properly. Also, as we talked about previously, it’s often not the whole picture, which is why treatment may help some, but not completely.

Root Cause #3: Candida or Yeast Overgrowth 🍞

This is another piece that’s frequently missed or dismissed.

Yeast can affect digestion, immune signaling, and how your gut responds to food.

Patients with yeast issues often describe:

  • 💨 Bloating that doesn’t follow a clear pattern
  • 🍬 Sugar or carb cravings
  • 💊 Symptoms that worsen after antibiotics
  • 🔁 IBS treatments that never quite worked

When Candida is part of the picture and isn’t addressed, IBS symptoms tend to linger — no matter what else you try.

Root Cause #4: Digestive Function Problems ⚙️

Sometimes the issue isn’t what you’re eating — it’s how your body is processing it.

This can include:

  • Low digestive enzymes
  • Poor bile flow
  • Low acid production
  • Absorption problems
  • Motility issues
  • Etc

When digestion isn’t working properly, food becomes fuel for irritation and imbalance.

Patients often say:

“I feel worse after I eat, even when I eat ‘healthy.’”

That’s not normal — and it’s fixable once you understand what’s happening.

Why people don’t recover 🚧

Here’s the key point I don’t want you to miss:

Most people don’t have just one root cause.

They might have:

  • Food reactions and microbiome issues
  • Yeast plus digestive dysfunction
  • A post-infectious trigger layered on top of everything else

If you only treat one piece, you might feel a little better —
but you won’t feel normal.

That’s why so many patients say:

“I improved, but I never got all the way there.”

That’s not failure.
That’s incomplete treatment.

Why I’m Confident IBS Is Solvable 🌟

At the IBS Treatment Center, we’ve seen this pattern thousands of times.

Patients come to us after:

  • 👨‍⚕️ Seeing multiple doctors
  • 🧪 Running countless tests
  • 🥗 Trying every diet
  • 🗣️ Being told, “This is just IBS.”

And when we identify the real underlying causes and address them properly — they get better.

That’s why we guarantee results.

Not because IBS is simple — but because it becomes solvable when you see a real IBS expert, stop guessing and start addressing the real drivers.

Take the Next Step 🚀

If you’re reading this and thinking,

“This finally makes sense,”

then I’d encourage you to take the next step.

Regardless of where you live, we can help. We work with people around the world via telemedicine, and have been doing so since 2005.

👉 Click below to schedule a consultation and find out if you qualify for our program.

You don’t have to keep managing IBS, because there is a real path forward.

Close 💬

Thanks for reading. If you found this helpful, please leave a comment down below and bookmark our website for more insight into your health.

Remember to take good care of your body. It’s the only place that you have to live.

Related Content:

Candida vs IBS — How to Tell the Difference

Why Most IBS Treatments Fail (And What Actually Works)

IBS Isn’t the Answer — It’s the Beginning (Here’s the Truth)

How Drug Companies Influence IBS Care (And All Care)

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