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Gluten IgA Antibody (Serum) – Total

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.

Quick summary

["Gluten antibodies may indicate an immune reaction to gluten, guiding dietary or medical decisions."]

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

Key facts at a glance

LOINC
16901-1
Short code
Gliadin IgA Ser Ql
Synonyms
Gliadin IgA Ser Ql
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 healthcare provider may recommend this test if you have symptoms like stomach pain, diarrhea, fatigue, or unexplained weight loss. It could also be part of a screening for celiac disease, gluten sensitivity, or related conditions. Some people with autoimmune disorders or unexplained digestive issues may also be tested.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to stop certain medications (like steroids) that could affect results. If you’re on a gluten-free diet, your provider may want to confirm it’s been followed consistently.

What the Test Involves

A blood sample is taken from a vein, typically in your arm. The sample is sent to a lab for analysis. The test measures the total amount of IgA antibodies that react to gluten, which can be detected in your serum.

How Results Are Interpreted

Results are qualitative (yes/no) rather than numeric, indicating whether antibodies were detected. Elevated levels suggest a possible immune response to gluten, but further testing (like endoscopy or genetic screening) may be needed for a diagnosis.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Gluten IgA Antibodies (Serum)

Frequently asked questions

What Does a Positive or Elevated Result Mean?
A positive result may indicate gluten sensitivity or celiac disease, where the body’s immune system reacts to gluten. However, it’s not definitive on its own—your provider will use it alongside other tests, symptoms, and possibly a gluten challenge to make a diagnosis.
What If My Results Are Normal?
Normal results mean no detectable gluten-specific IgA antibodies were found in your blood. This doesn’t rule out gluten sensitivity or celiac disease entirely, so your provider may recommend additional testing or follow-up if symptoms persist.
Could This Test Be Wrong?
Yes, false positives or negatives can happen. For example, certain medications, infections, or autoimmune conditions may affect results. If your symptoms or test results are unclear, your provider may order confirmatory tests, like a gluten challenge or genetic testing (e.g., for HLA-DQ2/DQ8 genes).
  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