ImuPro is a commercial blood test that measures IgG antibodies to a broad panel of foods to suggest possible food intolerances and guide elimination diets. It detects IgG (including subclasses) against specific foods, but evidence linking IgG levels to harmful reactions is limited. It does not diagnose IgE-mediated allergy; results need clinical correlation and interpretation by a healthcare professional or dietitian.

The most accurate test for diagnosing a food allergy is a medically supervised oral food challenge—ideally a double-blind, placebo-controlled food challenge (DBPCFC). Skin prick and blood tests (specific IgE) are useful screening tools but can give false positives; component-resolved testing can improve specificity. Oral challenges should only be performed under clinical supervision because of the risk of anaphylaxis.

For suspected food allergy, clinicians commonly use skin prick testing and blood tests measuring specific IgE antibodies to the suspected food. These tests show sensitization but can give false positives. The oral food challenge, performed under medical supervision, is the diagnostic gold standard to confirm a true allergic reaction. Elimination diets and a detailed history also guide testing.

IgE food allergy tests (skin‑prick and specific IgE blood tests) detect sensitization and can support diagnosis, but a positive result doesn’t always mean clinical allergy. They’re useful for ruling out allergy when negative, but false positives and cross‑reactivity occur. Results must be interpreted with medical history by an allergy specialist; supervised oral food challenge remains the diagnostic gold standard.

Food allergy testing costs vary widely. Skin-prick tests are usually less expensive than blood (specific IgE) tests, while oral food challenges—the most definitive—are costliest because they require specialist supervision. Prices depend on region, provider and insurance coverage; individual tests or panels can range from modest fees to several hundred dollars. Ask your clinician about the most appropriate, cost-effective option.

There is no single best test. A thorough allergy evaluation combines clinical history with targeted tests: skin-prick testing for immediate IgE sensitization, serum-specific IgE (ImmunoCAP/RAST) when skin testing isn’t possible, patch testing for delayed contact allergies, and component-resolved tests or supervised oral food challenges—the latter being the gold standard for food allergy. Referral to an allergy specialist ensures appropriate selection and interpretation.