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Can Urine And Saliva Tests Pinpoint Other Food Allergies?

whitball

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whitball Explorer
whitball
Posted

I am having problems with rice and corn and stopped by a health food store on Friday to find other flour options. The person told me that urine and saliva samples can help me pinpoint the other foods that I am allergic to. Has anyone had this test done? The person told me that the test is very reliable. Why didn't my dr. suggest this?

  • 2 weeks later...
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holdthegluten Rising Star
holdthegluten
Posted
I am having problems with rice and corn and stopped by a health food store on Friday to find other flour options. The person told me that urine and saliva samples can help me pinpoint the other foods that I am allergic to. Has anyone had this test done? The person told me that the test is very reliable. Why didn't my dr. suggest this?

I have only heard of tests being done by stool,blood,and the skin prick tests.

JennyC Enthusiast
JennyC
Posted

When they test for allergies using blood they look for large proteins called antibodies that will bind to the specific food proteins. Antibodies are too large to be filtered into the urine, so urine tests definitely won't work. Saliva does contain some antibodies, but not all types and not in large amounts. I did a quick google search on the subject and I found lots of saliva tests for viral diseases, but no food allergies. Sorry, but I think that the blood or skin prick tests are the best way to go. If you don't like needles, you should keep in mind that the blood test is one poke and they can test for lots of allergens.

  • 4 weeks later...
whitball Explorer
whitball
Posted
  • Author
When they test for allergies using blood they look for large proteins called antibodies that will bind to the specific food proteins. Antibodies are too large to be filtered into the urine, so urine tests definitely won't work. Saliva does contain some antibodies, but not all types and not in large amounts. I did a quick google search on the subject and I found lots of saliva tests for viral diseases, but no food allergies. Sorry, but I think that the blood or skin prick tests are the best way to go. If you don't like needles, you should keep in mind that the blood test is one poke and they can test for lots of allergens.

I recently contacted my dr. to ask for a test to find out other things that I was allergic to so that I would not need to do the trial an error thing with food. I told his nurse that I was having problems with rice and corn. The nurse called back and told me that corn and rice did not have gluten in them. Well.... no kidding! But I seemed to be reacting to it. Have you been tested for other allergens? What were the results?

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      By trents · Posted

      What Dr. Gunn states is essentially true. It is a rule out measure. But be aware that to possess either of the two primary genes that have been identified with celiac disease (or both) doesn't necessarily mean that you have or will develop celiac disease. Almost 40% of the general population carries one or both but only about 1% of the general population will develop active celiac disease. It remains latent until triggered by some stress event which may or may not occur. So, there is a genetic component to celiac disease but there is also an epigenetic component. 
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      Test interpretations

      By Dr. Gunn · Posted

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    • Scott Adams
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      Based on those results alone, it’s not possible to say you have celiac disease. The test that is usually most specific for celiac, tTG-IgA, is negative in your results, and the endomysial antibody (EMA) is also negative, which generally argues against active celiac disease. However, your deamidated gliadin IgA is elevated, and your total IgA level is also high, which can sometimes affect how the other antibody tests behave. Another important factor is that you were reducing gluten before the test, which can lower antibody levels and make the results less reliable. Because of that, many doctors recommend a gluten challenge (eating gluten regularly for several weeks) before repeating blood tests or considering an endoscopy if symptoms and labs raise concern. It would be best to review these results with a gastroenterologist, who can interpret them in context and decide whether further testing is needed.
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