Food Sensitivity Testing: Serum IgG Antibodies vs. Elimination Protocols
Reviewed by Integrative Medicine & Clinical Nutrition Faculty Board
Clinical Overview
Differentiating IgE true allergies from delayed IgG/IgA food sensitivities: interpreting ELISA titer panels and resolving chronic bloating and migraines.
Delayed food sensitivities involve IgG and IgA immune complex formation that manifests 24 to 72 hours post-ingestion with fatigue, joint pain, eczema, and brain fog.
1. IgE vs. IgG Immune Responses
Immune Parameter
IgE Immediate Allergy
IgG Delayed Sensitivity
Onset of Symptoms
Immediate (Minutes to 2 hours)
Delayed (24 to 72 hours)
Clinical Presentation
Anaphylaxis, hives, airway constriction
Bloating, brain fog, joint stiffness, acne
Standard Testing
Skin prick, serum ImmunoCAP IgE
ELISA IgG antibody microarray panel
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Integrative Medicine & Clinical Nutrition Faculty Board
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