3 Evidence Questions Before Cutting Foods After an IgG Panel

If eating already feels like a series of guesses, a report full of flagged foods can look like the answer you have been waiting for. Before emptying the cupboard, ask what the test was designed to establish.

Three questions about the evidence

1. Does a flagged result establish an allergy? AAAAI explains that food IgG can reflect a normal response to food exposure; higher IgG4 can be associated with tolerance. A flagged IgG result is not a food-allergy diagnosis. Discuss symptoms with a qualified clinician.¹
2. Is the test being sold the one studied? The 2025 trial used a novel IBS-specific, 18-food assay and compared the resulting diet with a sham diet for eight weeks. Ask whether claims for your panel rely on research using that same test and population.²
3. What has the study actually shown? More participants on the experimental diet met the abdominal-pain improvement outcome. The authors called for a larger study to validate the observations. The result supports further study of that dietary strategy, not a conclusion that all flagged foods are allergies.²

Review the report with your symptoms

Bring the report, what you have already stopped eating and the symptoms you want help with. Ask the clinician to explain which findings are relevant, what assessment is needed and who can help review proposed diet changes.

You can say: “I want a useful eating plan. Can we check what this report can tell us before I restrict more foods?” Keep the answer and agreed next step with the report.

Bloated by Dinner includes a BellyClock log and a Test-It list with a visit script. Use them to organize the observations and questions you want reviewed. See the book.