Anti-tTG IgA (Celiac) Blood Test
Type
Blood Testing
Duration
15 min
Results
4 days
Evaluates immune system function through white blood cell and antibody measurements.
Celiac disease blood testing screens for antibodies that indicate an autoimmune reaction to gluten — a protein found in wheat, barley, and rye. The primary marker is tissue transglutaminase IgA (tTG-IgA), which is positive in roughly 98% of people with active celiac disease. Total IgA is also measured because some people have IgA deficiency, which can cause false-negative celiac results. Celiac disease affects approximately 1% of the population globally but is significantly underdiagnosed, with most cases going undetected for years. Left untreated, celiac disease can lead to nutrient malabsorption, osteoporosis, infertility, and increased risk of certain cancers.
Key Details
Who Is This For?
Anyone experiencing chronic digestive symptoms like bloating, diarrhea, or abdominal pain. People with unexplained iron deficiency anemia, fatigue, or bone loss. Those with a family history of celiac disease (10% risk in first-degree relatives). Anyone considering going gluten-free who wants a diagnosis first — important because testing is only accurate while eating gluten.
What's Included
Preparation Required
You must be eating gluten regularly for at least 6 weeks before testing — eliminating gluten before the test can cause a false negative. No fasting required. Continue your normal diet including bread, pasta, and other gluten-containing foods.
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- Category
- Diagnostic
- Sample Type
- Blood draw
- Duration
- 15 min
- Results
- 4 days
Bloody Good
On-demand blood testing without a GP visit. Over 200 tests available at 4000+ collection centres across Australia.
