A food allergy is a very specific immune system response from the immunoglobulin E (IgE) antibody or T-cells. An IgE reaction is easier to diagnosis as it comes on quickly occurring within minutes to an hour after touching, smelling or ingesting a particular food.
The treatment of a true IgE or T-cell immune response allergy is to avoid the allergen/food. Common food allergies include peanuts, fish, milk and eggs.
A food intolerance is a chemical reaction that does not involve the immune system. It is a lot more common than food allergies. Food intolerances are often tricky to diagnose because their reactions can be delayed and varied. Symptoms can include sweating, stomach, itching eyes and nose, excessive sneezing, headache, diarrhea, tremor and many more. IgA and IgG blood tests can help isolate which foods triggering reactions. Keeping a food diary to track reactions can be very helpful.
If you are interested in getting an IgA, IgG, IgE or ALCAT allergy testing done please get in contact with me. I use NutriPATH pathology in Melbourne. I have provided a link below to the tests they perform. The easiest way to use this website is to click on the health condition or goal on the right hand side panel.