What is the difference between a skin prick test and a blood test for allergy?
A skin prick test or a blood test are designed to measure a protein called IgE that is involved in many types of food allergic reactions. The tests detect the IgE antibodies that are specific for a particular food. The blood tests are most properly called “serum food-specific IgE tests” but are often called “RAST” (radioallergosorbent test) or referred to by various brand names.
