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Food Allergies Blog

By Victoria Groce, About.com Guide to Food Allergies

RAST Tests

Monday July 23, 2007
When you hear the term "allergen-specific IgE levels," that usually refers to the results of a RAST test, or radioallergosorbent test. It's a blood test used to determine the levels of IgE to a particular allergen. While RAST tests aren't perfect --- they don't exist for every allergen, and they're not considered as accurate as food challenges --- they're the safest way to test for allergies in people who have experienced very severe allergy symptoms. More:

Comments

August 1, 2007 at 11:28 am
(1) Peter says:

Note that prick skin testing is a more accurate method for the diagnosis of food allergies than RAST. This is in part because fresh foods can be used, which give better results. Further, there are less false positive results and less false negative results with skin testing compared to RAST.

November 4, 2008 at 2:37 pm
(2) Ike says:

Wow!! It’s getting better and better. Keep it up man.,

November 27, 2008 at 6:33 am
(3) Tyson says:

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November 27, 2008 at 2:00 pm
(4) Newton says:

Wow!! It’s getting better and better.,

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