Food Intolerance Test

An IgG-based food sensitivity screen that measures your immune system's reaction to common food proteins. Unlike IgE allergy testing (which detects immediate allergic reactions), IgG testing identifies delayed food sensitivities that can cause symptoms hours or days after eating — making them difficult to identify through elimination alone. Covers common trigger foods and provides data to guide targeted dietary adjustments.

Food intolerances are distinct from food allergies — they involve delayed immune responses (IgG-mediated) rather than the immediate IgE reactions that cause anaphylaxis. Symptoms typically appear hours to days after eating the trigger food, making identification through elimination diets alone frustratingly difficult. Common manifestations include bloating, headaches, skin breakouts, joint pain, fatigue, and brain fog. This blood-based panel screens for IgG reactivity to a broad range of common foods. Unlike elimination diets that require weeks of restriction and careful reintroduction, this test provides a targeted starting point — identifying which specific foods are triggering an immune response so dietary changes can be precise rather than unnecessarily broad. It is worth noting that food intolerance testing using IgG antibodies remains debated in conventional medicine. Some practitioners view elevated IgG as a normal response to food exposure rather than a pathological marker. However, many functional and integrative practitioners find the results clinically useful when combined with symptom tracking and guided elimination protocols. The test is most valuable when used as a tool to prioritise which foods to trial eliminating, not as a definitive diagnosis. ClearLabs delivers results within 2-3 business days through a secure digital dashboard. No fasting is required for the blood draw, and no GP referral is needed to order the test. With collection available at over 2,000 centres across Australia, testing is accessible regardless of your location.