YOu can look up Elimination Diet on here. Basically you would have to eliminate it from your diet, along with other common allergens (dairy, eggs, etc) and then reintroduce them one at a time to see if any give you a reaction. It is possible to develop food allergies because of a clogged liver. That is why the Liver Flush and Bowel Cleanse are the first things recommended when you start having problems (allergies, acne, pains).

Good Luck