195 | Is Gluten REALLY That Bad For You? (Part 1)

Gluten causes a transient leaky gut in everyone who eats it — not just people who are gluten sensitive. In Part 1 of this two-part deep dive, Dr. Steven Noseworthy breaks down what gluten actually is, the two "universal" reactions your gut has to wheat whether you're sensitive or not, and why food allergy, food sensitivity, and food intolerance are three completely different things your doctor may be using interchangeably.

You'll learn what gluten is made of (gliadin and glutenin), why celiac disease research spent decades hyper-focused on just one gluten subtype, and how the 1940s wartime observations of a Dutch pediatrician named Willem Dicke first cracked open the gluten-celiac connection.

Then Dr. Noseworthy explains the two reactions to wheat that happen to everybody, sensitive or not: how gliadin binds the CXCR3 receptor in your gut lining to release zonulin and transiently open your gut barrier, and how a separate wheat protein family called ATIs (amylase trypsin inhibitors) triggers inflammation through your innate immune system's TLR4 receptor — whether or not you have any gluten sensitivity at all.

Finally, he untangles one of the most misused sets of terms in nutrition: allergy, sensitivity, and intolerance are not interchangeable. A wheat allergy is a fast, IgE-driven histamine reaction. Gluten sensitivity is a slower, IgG-linked, symptom-dependent reaction that looks different from person to person. And an intolerance — like lactose intolerance — isn't an immune reaction at all, it's a missing enzyme. Knowing which one you're actually dealing with changes everything about how you test for it and treat it.

In This Episode:

- What gluten actually is — gliadin, glutenin, and why gluten-free baking is its own science project

- The real history of celiac disease, from ancient Greece to a WWII bread shortage in the Netherlands

- Why "non-celiac gluten sensitivity" wasn't even named until 2011 — and why the term is already being replaced

- The two gluten/wheat reactions that happen in everyone: transient leaky gut (zonulin) and gut inflammation (ATIs/TLR4)

- Food allergy vs. food sensitivity vs. food intolerance — the real immunological differences

- A preview of Part 2: celiac disease vs. non-celiac gluten sensitivity, gluten's contested link to Hashimoto's and your thyroid, and how gluten may affect blood flow to your brain

This is Part 1 of a two-part series — Part 2 drops soon and covers celiac disease vs. gluten sensitivity, the gluten-thyroid connection, and gluten's effect on brain blood flow.

Timestamps

0:00 Gluten and Gut Health

1:47 Introduction to Gluten and Recent Research

2:24 Gluten: Hype vs. Reality

4:06 What Is Gluten?

5:56 Celiac Disease and Wheat Sensitivity

9:15 How Gluten Affects the Gut

12:33 Wheat Allergy vs. Gluten Sensitivity

17:11 Part Two Preview

Link to Episode Page: https://www.drnoseworthy.com/gluten-leaky-gut-part-1

Want help figuring out where you actually land on the gluten spectrum instead of guessing from an elimination diet? Dr. Noseworthy runs a virtual functional medicine practice based in Florida, working with clients across the US and internationally. Reach out through the contact form at https://www.drnoseworthy.com.

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#GlutenFree #LeakyGut #inflammation #FunctionalMedicine