WHAT IS LEAKY GUT?

“Leaky gut” is the informal name for a concept called intestinal permeability.

What it means

Your intestines are lined with a tight barrier that controls what passes into your bloodstream. Normally, it lets nutrients through and blocks harmful substances like toxins, bacteria, and undigested food particles.

When people talk about “leaky gut,” they’re referring to the idea that this barrier becomes too permeable, allowing unwanted substances to “leak” into the bloodstream.

Is it a real condition?

Here’s where it gets nuanced:

• Increased intestinal permeability is real and measurable in medicine.

• It’s clearly linked to certain conditions like:

  • celiac disease

  • Crohn’s disease

  • irritable bowel syndrome (to a lesser extent)

But the broader idea often promoted online—that “leaky gut” is the root cause of a wide range of symptoms (fatigue, brain fog, skin issues, etc.)—is not well supported by strong scientific evidence.

Symptoms people associate with it

You might see claims linking it to:

• Bloating or digestive discomfort

• Food sensitivities

• Fatigue

• Skin problems

These symptoms are real, but they don’t automatically mean you have a “leaky gut.”

What actually affects gut barrier health

Things that can influence intestinal permeability include:

• Chronic inflammation

• Certain infections

• Long-term use of some medications (like NSAIDs)

• Alcohol use

• Poorly managed autoimmune disease

Bottom line

• “Leaky gut” as a buzzword is often overused and oversimplified.

• The underlying concept (intestinal permeability) exists, but it’s usually part of specific medical conditions, not a catch-all diagnosis.

If you’re dealing with symptoms, it’s more useful to focus on identifying a clear condition rather than assuming “leaky gut.” If you want, I can help you connect specific symptoms to more evidence-based explanations.