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Gluten IgA Antibody (Anti-Gliadin) Serum Test

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 celiac disease or gluten sensitivity.

Quick summary

["This test checks for gluten-related immune reactions in your blood."]

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

Key facts at a glance

LOINC
20496-6
Short code
Gliadin IgG Ser IA-aCnc
Synonyms
Gliadin IgG Ser IA-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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 Is This Test Done?

Your healthcare provider may recommend this test if you have symptoms like stomach pain, diarrhea, fatigue, or unexplained weight loss. It may also be used as part of a screening for celiac disease, especially if you have a family history of the condition or are diagnosed with other autoimmune disorders.

What Does a Positive Result Mean?

A positive result suggests your immune system is reacting to gluten, which could indicate celiac disease or gluten sensitivity. However, a positive result alone does not confirm a diagnosis—additional tests and evaluations are needed.

What to Expect Before the Test

No special preparation is usually required, but you may be asked to stop taking certain medications that could affect results, such as steroids or other immune-modifying drugs. Always follow your provider’s instructions.

What Happens During the Test?

A small blood sample is drawn from a vein in your arm. The sample is then sent to a lab for analysis. The process takes about 15 minutes, and you can return to your normal activities afterward.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Gluten IgA antibodies are part of an autoimmune response triggered by gluten ingestion. Elevated levels may signal celiac disease, where the immune system attacks the lining of the small intestine. This can lead to long-term digestive issues, nutrient deficiencies, or other health problems. Early diagnosis and gluten-free diet management are crucial for recovery.

Short name

Gluten IgA Antibody Test

Frequently asked questions

What Does a High or Low Level Mean?
A high level of gluten IgA antibodies may indicate an immune reaction to gluten, which could be due to celiac disease or gluten sensitivity. A low level does not necessarily mean the condition is absent, as other factors (like recent gluten exposure or other health conditions) could influence results.
Can This Test Be Done at Home?
No, this test requires a blood sample collected by a healthcare professional in a clinical setting. Home testing kits for gluten antibodies are available but typically measure different markers (like tTG-IgA) and are not the same as this test.
How Often Should I Get This Test?
If you have celiac disease or are at high risk, your doctor may recommend retesting every few years or as needed to monitor symptoms or changes in health. If you’re asymptomatic, testing may only be recommended if symptoms return or if you suspect gluten exposure.
  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