Gliadin (AGA) IgA

Blood Spot

Optimal Result: 0 - 20 u.

Celiac & Gluten Sensitivity; blood spot Doctor's Data

From Healthmatters.io Team and reviewed by HM Editorial Team

Written on April 5, 2026 | Last updated Updated on April 5, 2026

Lab Results Explained and Tracked

Gliadin (AGA) IgA is one of the original antibodies used to assess immune reactivity to gluten. Gliadin is a protein found in wheat and other gluten-containing grains. In some individuals, the immune system mistakenly identifies gliadin as harmful and produces antibodies against it.

While AGA IgA can indicate a reaction to gluten, it is considered less specific and less accurate for diagnosing celiac disease compared to newer markers such as deamidated gliadin peptide (DGP) and tissue transglutaminase (tTG) antibodies. However, it may still provide useful information in certain clinical contexts, particularly when evaluating non-celiac gluten sensitivity (NCGS) or broader immune responses to gluten.

What Does an Elevated AGA IgA Mean?

Elevated AGA IgA levels may suggest:

Immune sensitivity to gluten
Non-celiac gluten sensitivity
Possible celiac disease (less specific)
Increased intestinal permeability (“leaky gut”)

Unlike DGP antibodies, AGA antibodies target native (non-deamidated) gliadin, which makes them more prone to false positives and less reliable for confirming celiac disease.

Symptoms Associated with Elevated Levels

Elevated AGA IgA may be associated with:

Bloating, gas, or abdominal discomfort
Diarrhea or constipation
Fatigue or brain fog
Headaches
Skin issues
Generalized inflammation

Symptoms can vary widely, and some individuals may have minimal or no noticeable symptoms.

Important Testing Considerations

Testing should be performed while consuming a gluten-containing diet for accurate results.

AGA IgA is typically interpreted alongside more specific markers, including:

Tissue Transglutaminase (tTG) IgA
Deamidated Gliadin Peptide (DGP) antibodies
Total IgA levels

Because of its lower specificity, AGA IgA is not used alone to diagnose celiac disease, but may provide supportive or complementary information.

What to Do If Your Levels Are High

If AGA IgA is elevated:

Follow up with more specific celiac testing (tTG and DGP antibodies)
Do not remove gluten from your diet before confirmatory testing
Work with a healthcare provider to determine whether symptoms are related to gluten

If gluten sensitivity or celiac disease is confirmed, a gluten-free diet may be recommended.

Why This Marker Matters

Although largely replaced by more accurate tests, AGA IgA can still help identify general immune reactivity to gluten, particularly in individuals with non-celiac gluten sensitivity or early immune responses.

Lab Results Explained and Tracked

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What does it mean if your Gliadin (AGA) IgA result is too high?

Elevated AGA IgA indicates an immune response to gliadin and may reflect gluten sensitivity or broader immune activation, though it is less specific for celiac disease than newer markers.

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Gliadin (AGA) IgA

What Does an Elevated AGA IgA Mean?

Symptoms Associated with Elevated Levels

Important Testing Considerations

What to Do If Your Levels Are High

Why This Marker Matters

All Your Lab Results. One Simple Dashboard.

What does it mean if your Gliadin (AGA) IgA result is too high?

All Your Lab Results. One Simple Dashboard.

Import, Track, and Share Your Lab Results Easily

Import, Track, and Share Your Lab Results

Article Review & Sources

Bring All Your Lab Results Together — In One Place

Gather Your Lab History — and Finally Make Sense of It

Finally, Your Lab Results Organized and Clear

Advanced Plan

Unlimited Account

Pro Monthly

What's included in a Healthmatters membership

Import Lab Results from Any Source

See Your Health Timeline

Understand What Your Results Mean

Enter Your Lab Reports Yourself — Always Free Enter Your Lab Reports — Always Free

Visualize Your Results

Export Your Complete Lab History in a Single File Export Your Complete Lab History

Comprehensive Data Entry Service for Your Reports Data Entry Service for Your Reports

Securely Share With Anyone You Trust

Let Your Lab Results Tell the Full Story

Once your results are in one place, see the bigger picture — track trends over time, compare data side by side, export your full history, and share securely with anyone you trust.

Bring all your results together to compare, track progress, export your history, and share securely.

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All Your Lab Results.
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