it's not ibs. there's a name for what you actually have.

You brought your symptoms to your doctor.

The bloating after every meal. The gas. The constipation that switches to diarrhea for no reason. The fatigue that makes no sense given how well you sleep. The fullness that won’t quit even when you barely ate.

You left with a diagnosis.

IBS. GERD. Stress. Here’s a prescription.

And a quiet feeling that something deeper was still being missed.

You’re not wrong.

What’s actually happening

There’s a condition called SIBO — Small Intestinal Bacterial Overgrowth — and research suggests it may be responsible for a significant portion of IBS diagnoses that never fully resolve with standard treatment.

Your small intestine is supposed to be relatively low in bacteria. SIBO happens when bacteria that belong further down migrate upward and multiply where they shouldn’t be.

Those bacteria start fermenting your food before it’s properly digested. That fermentation produces gas — specifically hydrogen and methane — and those gases behave very differently in your body.

Hydrogen gas is associated with diarrhea. Methane gas slows gut motility and is more commonly linked to constipation. When someone produces both — which happens more often than most people realize — they experience both. Constipation one week. Diarrhea the next. The exact pattern that gets labeled IBS, treated with symptom management and started on a low FODMAP diet.

Two different gases. Two different mechanisms.

One confusing picture that standard labs were never designed to untangle.

Why FODMAP isn’t the answer

Many people with these symptoms get put on a low FODMAP diet. And it helps — short term.

But here’s what that approach misses.

FODMAP works by restricting the fermentable carbohydrates that feed bacteria. It starves the overgrowth temporarily and symptoms improve. But the bacteria are still there. The root cause is untouched.

Worse — a long term low FODMAP diet cuts out many of the prebiotic rich foods your gut microbiome actually needs to heal. You end up restricting your way to short term relief while quietly starving the beneficial bacteria your gut depends on.

That’s not healing. That’s managing.

Why it keeps getting missed. Because the test isn’t standard.

SIBO is diagnosed through a non-invasive breath test — done at home — that measures the hydrogen and methane gases your bacteria are producing in real time over two to three hours. This method is validated by the North American Consensus Guidelines published in the American Journal of Gastroenterology.

Hydrogen dominant SIBO shows up early in the test. Methane dominant shows up differently and requires its own treatment approach entirely.

Your regular labs will never catch this. Because it is not a test done at your primary care office .

No more guessing

You could spend years cutting gluten, cutting dairy, cutting everything the internet tells you to cut. And still not feel better.

Because without knowing what you’re actually dealing with you’re just guessing.

Two people can have the exact same bloating. Completely different root cause. What works for one does nothing for the other.

Knowing changes everything.

Treatment becomes targeted — whether that’s specific antimicrobial herbs, pharmaceutical antibiotics like Rifaximin for hydrogen dominant SIBO, or a combined approach for mixed presentations.

Eating well still matters. Sleep matters. Managing stress matters.

But knowing exactly what’s happening in your gut? That’s the breath of fresh air most people never get.

And now your know it exists.

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