When Should You Get Tested for Celiac Disease?
July 31, 2026
Celiac disease is an autoimmune disorder triggered by gluten—a protein found in wheat, barley, and rye. When people with celiac disease consume gluten, their immune system attacks the lining of the small intestine, leading to inflammation and poor nutrient absorption.
Blood tests are usually the first step in diagnosing celiac disease. They help doctors identify antibodies produced by the immune system in response to gluten. Although blood tests are highly useful, they are often followed by additional testing to confirm the diagnosis.
Blood tests can:
Early diagnosis can help prevent long-term complications such as anemia, osteoporosis, infertility, vitamin deficiencies, and intestinal damage.
The tTG-IgA test is the most commonly recommended screening test for celiac disease.
A positive result suggests celiac disease but usually requires confirmation through additional testing.
Some people have IgA deficiency, which can make the tTG-IgA test falsely negative.
This test measures overall IgA levels to ensure the main screening test is reliable.
If IgA deficiency is present, your doctor may recommend IgG-based tests instead.
The EMA-IgA test is highly specific for celiac disease.
It is commonly used to:
Although very accurate, it is generally more expensive than the tTG-IgA test.
The DGP test is especially useful for:
Doctors may order DGP-IgA, DGP-IgG, or both depending on the clinical situation.
Modern celiac blood tests are highly accurate when the patient is still eating gluten regularly.
However, no blood test alone can diagnose celiac disease with complete certainty. Your healthcare provider will interpret the results along with your symptoms, medical history, and, when necessary, an intestinal biopsy.
No.
This is one of the most common mistakes people make.
If you remove gluten from your diet before testing, antibody levels may decrease, leading to false-negative results.
Continue eating gluten until your doctor completes the recommended diagnostic process unless advised otherwise.
A positive blood test does not always confirm celiac disease.
Your doctor may recommend:
These tests help confirm the diagnosis before lifelong dietary changes are recommended.
Yes.
False-negative results can occur due to:
If symptoms strongly suggest celiac disease, your doctor may recommend further evaluation despite negative blood test results.
Testing is recommended for people who have:
Not always. Many patients require an intestinal biopsy to confirm the diagnosis.
Some laboratories offer direct testing, but results should always be interpreted by a qualified healthcare professional.
Yes. Antibody levels often decrease after following a strict gluten-free diet, making blood tests useful for monitoring progress.
Blood tests are the foundation of celiac disease diagnosis and play a vital role in identifying individuals who may require further evaluation. The most commonly used tests include tTG-IgA, Total IgA, EMA-IgA, and DGP antibodies.
If you experience symptoms or have a family history of celiac disease, consult your healthcare provider for appropriate testing. Early diagnosis and a medically supervised gluten-free diet can significantly improve long-term health and quality of life.
GM Foods Bahawalpur supports celiac disease awareness by providing information and promoting high-quality gluten-free food options for individuals who need to avoid gluten as part of their medical care.
