Anti-Deamidated Gliadin Peptide Immunoglobulin G (DGP IgG) Blood Test
$48.00 AUD
Experiencing bloating, fatigue or digestive symptoms after eating gluten, and want to check whether coeliac disease could be behind it?
Measures IgG antibodies against deamidated gliadin peptides for coeliac disease screening. Remains accurate when IgA deficiency makes the standard tTG-IgA test unreliable. Usually ordered alongside tTG-IgA as part of a coeliac serology panel.
You will be emailed a referral to take to your local collection centre. If you ever have any questions, we're here to help.
Getting your health measured shouldn't be hard! We're here to help you every step of the way.
1
Order a test
Order the private test that suits you and your goals. After ordering, you will receive your referral by email.
2
Collect the sample
Attend one of our 4000+ partner collection centres throughout Australia. Search locations.
3
Receive your results
View all your lab results in your secure health dashboard. Easy!
Overview
DGP IgG testing detects antibodies to deamidated gliadin peptides, gluten fragments that trigger immune responses in coeliac disease. This blood test screens for coeliac disease, particularly when standard IgA-based testing may be unreliable.
IgA deficiency occurs more frequently in people with coeliac disease. When someone lacks adequate IgA, the standard tTG-IgA screening test produces false negatives. DGP IgG uses the IgG antibody class, remaining accurate regardless of IgA status, with collection available across Australia.
Most commonly ordered alongside tTG-IgA as part of coeliac serology, this test strengthens screening accuracy.
Symptoms
Recommended for people with digestive symptoms suggesting coeliac disease, those with IgA deficiency who need an alternative screening pathway, or as part of a broader coeliac serology panel alongside tTG-IgA.
Questions
Antibodies to deamidated gliadin peptides—gluten fragments modified during digestion. These antibodies indicate immune reaction to gluten.
Both screen for coeliac disease. DGP IgG uses a different antibody class (IgG) and target, making it valuable when IgA testing is unreliable.
IgA deficiency is more common in coeliac disease. If someone lacks IgA, tTG-IgA testing will be falsely negative. DGP IgG remains accurate.
Yes. Gluten-free diets reduce antibody levels, potentially causing false negatives. Continue normal gluten intake for at least 6 weeks before testing.
Positive results warrant referral to gastroenterology for confirmation, typically with endoscopy and intestinal biopsy before starting gluten-free diet.
Antibody testing screens for coeliac disease. Definitive diagnosis usually requires intestinal biopsy showing characteristic villous atrophy.
Dr. Vu Tran Bloody Good’s Chief Medical Officer
Biomarker Tested
No biomarkers found
How to prepare
After the test
Your test results will be available in your private dashboard. If there are any urgent issues, we'll let you know so you can follow up with your health professional.
Understanding results
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Frequently Asked Questions
Most collection centres accept walk-ins. Some may require a booking - check details when you click on your chosen location.
If your test needs fasting, we’ll include that in your instructions after you order. Fasting usually means no food for 8–12 hours, but water is fine.
Just your pathology referral form (we email it to you)
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