Gluten Immunoglobulin G (IgG) Antibody, Serum
This test measures the level of antibodies your body produces in response to gluten, a protein found in wheat, barley, and rye. It helps assess potential gluten sensitivity or autoimmune conditions like celiac disease.
["This test helps identify if your immune system reacts to gluten, which may indicate gluten sensitivity or related conditions."]
Key facts at a glance
- LOINC
- 102747-3
- Short code
- Gluten IgG RAST
- Synonyms
- Gluten IgG RAST
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- rast
- CPT
- 84484
- SNOMED
- 302774002
- 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, bloating, fatigue, or unexplained weight loss, or if you suspect gluten-related issues despite a gluten-free diet. It can also be used to monitor ongoing conditions like celiac disease or non-celiac gluten sensitivity.
What to Expect Before the Test
No special preparation is usually needed, but you may be asked to fast for a few hours before the blood draw. Wear comfortable clothing and plan to rest after the test. Avoid alcohol and strenuous activity before the procedure.
What Happens During the Test
A healthcare professional will draw blood from a vein in your arm using a small needle. The process is quick and typically causes only minor discomfort. The blood sample is then sent to a lab for analysis.
What the Results Mean
Results are not provided as a single numeric range since gluten antibody levels vary widely among individuals. Your provider will interpret the results in the context of your symptoms, medical history, and other tests. Elevated levels may suggest gluten sensitivity or related conditions.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Gluten IgG Antibody
Frequently asked questions
What does a positive test result mean?
Can I eat gluten before the test?
How long does it take to get results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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 17, 2026. · Read our editorial policy