A radioallergosorbent test is a blood test using radioimmunoassay test to detect specific IgE antibodies in order to determine the substances a subject is allergic to. This is different from a skin allergy test, which determines allergy by the reaction of a person's skin to different substances.

What is the meaning of RAST?

RAST: Radioallergosorbent test, an allergy test that is done on a sample of blood. RAST is used to check for allergic sensitivity to specific substances.

What does RAST to mean on an allergy test?

Older-generation allergy test has its limitations

A radioallergosorbent (RAST) test measures the level of allergen-specific IgE antibodies in your blood. Simply put, it measures your immune system's reaction to a particular food allergen.