A mail-order food intolerance test cannot read your gut

The report looks precise because precision sells

Mail-order intolerance panels can produce pages of coloured scores against dozens or even hundreds of foods. That volume looks thorough. It also turns ordinary exposure to food into a suspicious finding and gives the customer a dramatic list to act on immediately.

The Australasian Society of Clinical Immunology and Allergy says there is no credible evidence that food-specific IgG antibodies diagnose food allergy or intolerance. IgG commonly reflects exposure to a food, including in healthy people. A positive result can therefore make a normal part of eating look like proof of disease.

A bigger test panel does not create a better answer. It creates more chances to be told that normal food is the problem.

The real cost is not only the kit

The kit price is the obvious expense. The quieter cost comes next: separate groceries, complicated restaurant orders, fear around ingredients and a shrinking list of safe foods. ASCIA warns that unproven testing can lead to misdiagnosis, ineffective treatment and potentially harmful dietary restriction.

That matters even more when someone already has persistent gut symptoms. Coeliac disease, inflammatory bowel disease, allergy, IBS and other conditions do not share one home-test pathway. Cutting gluten, dairy, grains and half the vegetable aisle at once may change symptoms, but it also makes it much harder to work out what actually happened.

Investigate one useful question at a time

Start with a GP when symptoms are persistent, severe, worsening or affecting weight and daily life. Take a simple record of meals, timing, symptoms, bowel changes, medications and factors such as stress. That history can help a clinician choose testing that answers a real question instead of screening the entire pantry.

When a food challenge or elimination is appropriate, do it in a defined sequence with an accredited practising dietitian or relevant specialist. Remove only what the investigation requires, watch what changes and reintroduce where appropriate. The goal is not the longest avoidance list. It is the widest, safest diet that works for your actual body.