What is the difference between a Food Allergy Test, Food Sensitivity Testing, and the Celiac Disease Screening Test?

A food allergy is what happens when your immune system mistakes a certain food as a threat to your body (this is then called an “allergen”) and produces IgE antibodies as a result. Food allergies have distinct symptoms, such as itching, hives, nausea, vomiting, and difficulty breathing, and can be serious and life-threatening. The Food Allergy Test results will tell you whether you have IgE reactivity to the food allergens tested. The results of this test may be used, along with your medical history and symptoms, by your healthcare provider to help create a plan that’s right for you.

Food sensitivity testing shows IgG antibody reactivity to different foods. IgG and IgE are different types of antibodies. Food sensitivity can cause a wide range of symptoms such as abdominal pain, bloating, indigestion, and headaches or migraines. These symptoms are generally more delayed in nature than food allergy symptoms. The Food Sensitivity Test is intended to identify foods in your current diet that might be connected to food sensitivity symptoms. The results can help a person prioritize which foods to consider for a two-part elimination diet

Celiac disease is an autoimmune disorder in which the immune system reacts to gluten. It involves inflammation and damage to your small intestine and prevents your body from getting the nutrients you need from food. Celiac disease can cause both digestive and other bodily symptoms. These symptoms are generally delayed. The Celiac Disease Screening Test measures another type of antibody called tTG-IgA (and DGP-IgG if indicated), and may be a first step in checking your digestive health.