Biomarker Reference · IgG-Wheat
Immunoglobulin G to Wheat (IgG-Wheat) is a clinical biomarker used in immune-system assessment. Wheat contains multiple protein fractions beyond gliadin — glutenins, albumins, and globulins — each capable of eliciting immune responses. It is measured in 2 laboratory tests on BiomarkersLabs.com.
Wheat contains multiple protein fractions beyond gliadin — glutenins, albumins, and globulins — each capable of eliciting immune responses. IgG antibodies to whole-wheat extract capture a broader antigenic repertoire than gliadin alone, reflecting cumulative exposure to wheat proteins. These antibodies develop through the gut-associated lymphoid tissue and may persist for weeks to months after exposure.
IgG-wheat forms part of comprehensive food-sensitivity panels and may signal immune reactivity in patients who report symptoms with wheat ingestion but lack coeliac or IgE-mediated wheat allergy. It does not replace coeliac serology (IgA-tTG, EMA) or IgE-mediated allergy testing (specific IgE, skin prick), and its clinical utility remains contested. Some practitioners use it to guide empirical elimination trials, but reproducibility and symptom correlation require prospective validation.
Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.
2 tests on BiomarkersLabs.com include this biomarker.
Immunoglobulin G to Wheat reference range in this test: Laboratory-specific; typically <20 U/mL negative, 20–30 equivocal, >30 positive.
Immunoglobulin G to Wheat reference range in this test: Laboratory-specific; threshold varies by assay platform.
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