A RAST test (short for radioallergosorbent test) is a blood test used to determine to what substances a person is allergic. This is different from a skin allergy test, which determines allergy by the reaction of a person's skin to different substances.
Because there are other tests that help with confirmation, results are best interpreted by a doctor. Since at least 2010, health organizations have recommended that the RAST test be abandoned as a diagnostic test for allergy in favor of more sensitive fluorescence enzyme-labeled assays.
Read more about RAST Test: History, Indication, Method, Scale
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