EPISODE · May 18, 2026 · 31 MIN
4: Why Food Sensitivity Tests Confuse Everyone
from Team Gut Girls · host Team Gut Girls
In this Team Gut Girls episode, Drs. Whitney Baxter, ND, Dr. Christina Carew, ND and Dr. Dominique Vanier, ND discuss bloating and the popularity of IgG food sensitivity tests, contrasting them with IgE allergy testing and explaining that IgG reflects a delayed immune exposure signal rather than an immediate, potentially dangerous allergic reaction. They distinguish food intolerance as malabsorption/fermentation (e.g., lactose, fructose, fructans; low-FODMAP concepts) rather than an immune response. They review a 2026 IBS literature review (13 studies, ~900 patients) where IgG-based elimination diets often improved symptoms, but note major study limitations and risks of broad restriction, fear, and malnutrition. They highlight concerns about test accuracy/reproducibility and cite European, Canadian, and American guidelines recommending against IgG testing for diagnosing food allergy/intolerance, suggesting antibodies may reflect oral tolerance. They advocate systematic evaluation (rule out celiac and true allergies, time-limited, planned eliminations with reintroduction, and avoiding unreliable testing (including hair-based tests).
What this episode covers
In this Team Gut Girls episode, Drs. Whitney Baxter, ND, Dr. Christina Carew, ND and Dr. Dominique Vanier, ND discuss bloating and the popularity of IgG food sensitivity tests, contrasting them with IgE allergy testing and explaining that IgG reflects a delayed immune exposure signal rather than an immediate, potentially dangerous allergic reaction. They distinguish food intolerance as malabsorption/fermentation (e.g., lactose, fructose, fructans; low-FODMAP concepts) rather than an immune response. They review a 2026 IBS literature review (13 studies, ~900 patients) where IgG-based elimination diets often improved symptoms, but note major study limitations and risks of broad restriction, fear, and malnutrition. They highlight concerns about test accuracy/reproducibility and cite European, Canadian, and American guidelines recommending against IgG testing for diagnosing food allergy/intolerance, suggesting antibodies may reflect oral tolerance. They advocate systematic evaluation (rule out celiac and true allergies, time-limited, planned eliminations with reintroduction, and avoiding unreliable testing (including hair-based tests).
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4: Why Food Sensitivity Tests Confuse Everyone
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