Lab test
Celiac Disease Antibody Test – IgG & IgA
Celiac Disease Antibody Test – IgG & IgA can be ordered without a referral, and this guide covers what to expect. This test screens for antibodies in your blood that may indicate celiac disease.
What this test is
This test looks for specific antibodies, including Tissue Transglutaminase (tTG) and Gliadin antibodies, in your blood. These antibodies can be elevated in individuals with celiac disease.
What it measures
- Tissue Transglutaminase Antibody (tTG) IgG — reflects an immune response to tissue transglutaminase
- Tissue Transglutaminase Antibody (tTG) IgA — reflects an immune response to tissue transglutaminase
- Gliadin Antibody (GA) IgG — reflects an immune response to gliadin
- Gliadin Antibody (GA) IgA — reflects an immune response to gliadin
What the test involves
A healthcare professional will collect a blood sample, typically from a vein in your arm. The sample is then sent to a laboratory for analysis.
Why it is often ordered
Clinicians often order this test to help evaluate symptoms that could be related to celiac disease. It can be used as an initial screening tool.
Preparation
Follow any specific instructions provided by the laboratory where your blood will be drawn. It is generally recommended to continue your normal diet before the test.
How results are reported
Results are typically available within a few business days and will be provided to your healthcare provider. Reference ranges, which help interpret your results, vary between laboratories.
Before you go
- Fasting requirements
- Test preparation instructions
- How to receive your results
FAQ
Frequently asked questions
What is celiac disease?
Celiac disease is an autoimmune disorder where ingesting gluten leads to damage in the small intestine. It is not an allergy but an immune system reaction.
What is gluten?
Gluten is a protein found in wheat, barley, and rye. It is commonly found in bread, pasta, and many processed foods.
Can I stop eating gluten before the test?
No, it is important to continue eating gluten before this test. Stopping gluten intake can lead to inaccurate results.
What happens if my test results are positive?
A positive screening test suggests the presence of antibodies related to celiac disease. Your clinician will discuss these results with you and may recommend further testing or evaluation.
Related
Related tests
Locations
Request Celiac Disease Antibody Test – IgG & IgA by state
Choose a state for local context.