Ohhhh ikf725 you reminded me. My son's allergist ordered what he called a "Cap Rast" test for my son to determine the likelihood that he would react to the foods he was allergic to. It's a blood test that measures antibodies and it gives more data than the skin test. You may want to ask about it at his next visit. Here is a link:
http://www.foodallergy.org/downloads...rgyTesting.pdf