12/11/2012
...which is applied to your skin for approximately 48 hours. In most cases, 20-30 different substances are tested at a time. When being used to test for food reactions, tiny cups containing small amounts of a pure food are taped to the patient’s back. The specific foods used in the test are selected based on the patient’s diet, previous allergic reactions, and/or previous skin prick test results. After the 48 hour period, you return to...