Deamidated gliadin antibody IgA and IgG: interpretation and levels

The deamidated gliadin antibody IgA and IgG tests measure immune response to gluten and help detect Celiac disease. Normal levels are below 20 U/mL. Elevated results indicate an active immune reaction to gluten and possible intestinal inflammation. Low levels usually mean no autoimmune response or effective gluten avoidance.

Contents

→ Result interpretation
→ Check your value Deamidated Gliadin Antibodies
→ What is Deamidated Gliadin Antibodies
→ Reference ranges
→ Causes of abnormal values
→ Deamidated Gliadin Antibodies in combination with other markers
→ Possible symptoms
→ When to see a doctor
→ What to do if abnormal
→ Frequently asked questions
→ Related markers

Result interpretation Deamidated Gliadin Antibodies

What your result means based on common reference ranges

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Normal

Deamidated gliadin antibody levels within normal range indicate no active autoimmune gluten response or intestinal inflammation.

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Mildly elevated

Mildly elevated deamidated gliadin antibody IgA levels suggest early immune activation or possible gluten sensitivity.

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Significantly elevated

High deamidated gliadin antibody IgG or IgA levels strongly indicate active celiac disease with intestinal mucosal damage.

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Below normal

Low deamidated gliadin antibody levels reflect absence of gluten-triggered immune activity or strict gluten-free diet adherence.

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Deamidated Gliadin Antibodies, U/mL

Sex

Age

What is Deamidated Gliadin Antibodies?

Deamidated gliadin antibodies (DGP IgA and IgG) are produced when the immune system reacts to modified gluten proteins. This blood test is used to evaluate gluten-related disorders, particularly celiac disease, and is often combined with tTG IgA and total IgA testing. Elevated levels reflect immune-mediated inflammation in the small intestine, which can lead to malabsorption, anemia, and nutrient deficiencies. The test is especially useful in children and in patients with IgA deficiency, where IgG antibodies provide additional diagnostic value.

Reference ranges

Group	Normal range	Unit
Men	0 – 20	U/mL
Women	0 – 20	U/mL
Children	0 – 20	U/mL

Causes of abnormal values

Causes of low Deamidated Gliadin Antibodies

• Strict gluten-free diet — removal of antigen reduces antibody production over time
• Absence of celiac disease — immune system does not react to gluten proteins
• Immunosuppressive therapy — reduced immune activity lowers antibody formation
• Advanced intestinal damage — immune response may diminish in severe untreated cases

Causes of high Deamidated Gliadin Antibodies

• Celiac disease — autoimmune reaction damages intestinal villi due to gluten exposure
• Active gluten intake — continuous antigen stimulation maintains elevated antibody production
• Dermatitis herpetiformis — skin manifestation of gluten intolerance increases antibody levels
• IgA deficiency — compensatory rise in deamidated gliadin antibody IgG
• Early childhood celiac — immature immune response favors DGP elevation before other markers
• Non-celiac gluten sensitivity — immune activation without classic intestinal damage

Deamidated Gliadin Antibodies in combination with other markers

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High DGP IgA + High tTG IgA Strong evidence of active celiac disease with significant intestinal inflammation and autoimmune response.

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High DGP IgG + Low Total IgA Indicates selective IgA deficiency with compensatory IgG-mediated immune activation.

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High DGP + Normal tTG Early-stage celiac disease or pediatric cases where DGP is more sensitive marker.

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Low DGP + High symptoms Suggests non-gluten-related pathology or prior gluten restriction affecting antibody production.

Possible symptoms

•Chronic bloating and abdominal discomfort
•Persistent diarrhea or fatty stools
•Iron-deficiency anemia and fatigue
•Unexplained weight loss
•Growth delay in children

When to see a doctor

Consult a doctor if deamidated gliadin antibody IgA or IgG levels exceed 20 U/mL or symptoms persist. Levels above 30 U/mL with digestive issues require specialist evaluation. Ongoing symptoms despite normal levels should also be assessed.

What to do if abnormal

🥖 Continue eating gluten until testing is complete
🧪 Request total IgA to validate IgA-based results
📊 Track symptoms and diet patterns
👨‍⚕️ Consult a gastroenterologist if elevated
🔬 Consider biopsy if diagnosis remains uncertain

The information on this page is intended for general understanding of test results and does not replace medical consultation. Accurate interpretation requires considering other blood markers and individual factors.

Content is based on medical literature and used within the PulseBook analytical system.

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Frequently asked questions

What is the normal range for deamidated gliadin IgA?

The normal range for deamidated gliadin antibody IgA is below 20 U/mL. Values within this range indicate no significant immune reaction to gluten. Results must be interpreted while consuming gluten, as dietary restriction can falsely lower levels.

What does it mean if deamidated gliadin antibody IgA is high?

High deamidated gliadin antibody IgA levels indicate that the immune system is reacting to gluten. This is strongly associated with celiac disease and intestinal inflammation, especially when combined with symptoms or other positive markers like tTG IgA.

What is gliadin antibody (IgG) and when is it used?

Gliadin antibody IgG (deamidated form) is used when IgA deficiency is suspected. It helps detect celiac disease in patients where IgA-based tests may be unreliable, improving diagnostic accuracy.

Gliadin (deamidated) Ab, IgG high but IgA normal — what does it mean?

This pattern often suggests IgA deficiency or early immune response. Deamidated gliadin antibody IgG becomes the primary marker when IgA production is insufficient, helping identify hidden celiac disease.

What is borderline celiac (20–30 U/mL results)?

Borderline results indicate mild immune activation. Deamidated gliadin antibody levels in this range require follow-up testing and clinical correlation, as they may represent early disease or temporary immune response.

What is deamidated gliadin and why is it important?

Deamidated gliadin is a modified gluten protein that triggers a stronger immune response in celiac disease. Testing antibodies against it improves diagnostic sensitivity compared to older gliadin tests.