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      Frequently Asked Questions About Celiac Disease   09/30/2015

      This Celiac.com FAQ on celiac disease will guide you to all of the basic information you will need to know about the disease, its diagnosis, testing methods, a gluten-free diet, etc.   Subscribe to FREE Celiac.com email alerts What are the major symptoms of celiac disease? Celiac Disease Symptoms What testing is available for celiac disease? - list blood tests, endo with biopsy, genetic test and enterolab (not diagnostic) Celiac Disease Screening Interpretation of Celiac Disease Blood Test Results Can I be tested even though I am eating gluten free? How long must gluten be taken for the serological tests to be meaningful? The Gluten-Free Diet 101 - A Beginner's Guide to Going Gluten-Free Is celiac inherited? Should my children be tested? Ten Facts About Celiac Disease Genetic Testing Is there a link between celiac and other autoimmune diseases? Celiac Disease Research: Associated Diseases and Disorders Is there a list of gluten foods to avoid? Unsafe Gluten-Free Food List (Unsafe Ingredients) Is there a list of gluten free foods? Safe Gluten-Free Food List (Safe Ingredients) Gluten-Free Alcoholic Beverages Distilled Spirits (Grain Alcohols) and Vinegar: Are they Gluten-Free? Where does gluten hide? Additional Things to Beware of to Maintain a 100% Gluten-Free Diet Free recipes: Gluten-Free Recipes Where can I buy gluten-free stuff? Support this site by shopping at The Celiac.com Store.

Question About Ttg Iga
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2 posts in this topic

Is there any other reason than celiac that would cause a tTg IgA to be even slightly elevated? Do "normal" people have some tTg IgA in their systems?

 

The reason that I ask is that mine was tested recently. Now, I've been gluten-free since Nov 2011 and did (with advice from my doc and my own desire) a gluten challenge in July (I'm diagnosed NCGS). I only lasted 12 days on the challenge and broke out in a lacy full body rash, joint pain, heartburn, etc. I already had the lab request paperwork from my doc for the tTg and a CBC so I went ahead and did the lab work even though I knew the tTg wouldn't be accurate. I didn't get the lab work done for a month AFTER I stopped the challenge. Again, knew a 12 day challenge wasn't long enough for accurate results so having it done a month later wasn't really going to matter.

 

I got my results today and the tTg IgA was 5.4 (ref range 0-19.9 negative). My total IgA was 204 (ref range 70-400). 

 

So I'm curious 5.4 isn't 0 but it's also well below the 19.9. Could it be possible to have low amounts of tTg normally circulating?

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My best guess is - Its either a normal occurrence in humans or an inherent issue with the test.  That is why they have a range for normal.  For some reason, tests in healthy people may have a small amount of what is being tested for.  Or, the test has an issue that this normal range fixes.

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