Celiac Disease Blood Tests: What Normal Results Actually Mean

Celiac disease blood test lab report with vials

Celiac blood tests look for antibodies your immune system makes when gluten is present. The main one is tTG-IgA, short for tissue transglutaminase antibodies. Most doctors order it first, plus a total IgA check, because a small number of people are IgA-deficient and need different tests.

You must be eating gluten for these to mean anything. That is the part people miss. If you went gluten-free months ago and feel better, the antibodies may have faded and the test can miss the diagnosis. This is why doctors sometimes order a gluten challenge first.

A positive blood test is not the final word. Guidelines generally call for an endoscopy with biopsy to confirm, because the treatment is a lifelong strict diet and doctors want certainty. A negative test with strong symptoms still deserves follow-up. Ask about IgA deficiency and whether the timing was right.

Bring a list of your symptoms and how long they have lasted. Patterns help. Digestive issues, fatigue, anemia, and skin rashes cluster in ways doctors recognize. After diagnosis, eating well gluten-free becomes the daily work. Start here: gfcooking.food.

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