We stopped doing skin and blood tests for food allergies about three years ago. Frankly, we got mixed results each time and the more information I read, the less convinced I was that we were getting any helpful information from either type of test. We have continued food challenges, but even those results are often unclear. It becomes hard to separate what is physical and what is brought on by stress.
I am encouraged with new testing options available. Many are not covered by insurance plans, but it may be helpful to learn more and discuss with your allergist. Here's what I've seen recently:
Food Detective - can test a
person’s reaction against 59 common food types. Recently approved for use in India, it is not currently approved by the FDA for use in the United States. This test requires a finger prick for testing. You can see the video for more information.
Measurement of Specific Enzyme - "If it proves to be as useful as the
early trials suggest, it is likely to become the gold standard for
diagnosis of severe allergic reactions around the world.' said Dr Mich Lajeunesse, a member of the clinical research team about the new blood test that measures levels of an enzyme called CPA3.
As food allergy rates continue to rise, I suspect we'll see more and more diagnostic tests available. If you haven't been in touch with your allergist lately about newer testing options, check in to find out what's new. Please share if you have any personal experience with tests beyond the traditional skin and RAST (blood) tests.