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Gluten IgA Antibodies (Anti-Gliadin IgA) – Serum

Published: August 9, 2026Updated: August 16, 2026

This test measures the level of antibodies your body produces in response to gluten, a protein found in wheat, barley, and rye. It helps identify potential gluten sensitivity or celiac disease in people who may not have classic symptoms.

Quick summary

["This test helps diagnose gluten-related conditions by detecting immune system reactions to gluten."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
6924-5
Short code
Gliadin IgA Ser-aCnc
Synonyms
Gliadin IgA Ser-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like stomach pain, bloating, diarrhea, or fatigue, or if you’ve been diagnosed with a gluten-related disorder but symptoms persist. It’s also used in screening for celiac disease or gluten sensitivity, especially in individuals with a family history of these conditions.

What to Expect Before the Test

No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw blood, and you’ll likely feel a brief pinch. If you’re on blood thinners, let your doctor know before the test.

What the Test Results Mean

High levels of these antibodies may suggest gluten sensitivity or celiac disease, but they’re not definitive on their own. Your doctor will review your results alongside other tests, symptoms, and medical history to make a diagnosis.

Common Causes of Abnormal Results

False positives or negatives can occur due to other health conditions, medications, or recent infections. For example, certain autoimmune diseases or infections may affect antibody levels temporarily.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Gluten IgA Antibodies

Frequently asked questions

What does a positive result mean for my health?
A positive result (elevated antibody levels) may indicate a possible gluten-related condition, but it doesn’t confirm a diagnosis alone. Your doctor will guide you on next steps, such as dietary changes or additional testing to determine if gluten is causing your symptoms.
Can I eat gluten before this test?
Yes, you can eat your normal diet before this test. Unlike some other gluten-related tests, this one doesn’t require a strict gluten-free period beforehand.
How long will it take to get my results?
Results are typically available within 1 to 3 business days, depending on your lab and insurance. Your doctor will discuss the findings with you during your follow-up visit.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy