Question: the EMA and DGP tests you mentioned in your speech … does one have to be eating gluten to get an accurate result?
Reply: Blood test for gluten | celiac. see link for full answer.
EMA and tTG are antibody measurements. Also DGP. These antibodies take months and usually years to go down once you have started your gluten-free diet. If you have been off gluten for a few months, then these blood tests should still be accurate. But if you have been gluten-free for a few years, then they will not be useful for diagnosis – unless your gut has not healed.
If you have been diagnosed with celiac disease, then testing for EMA, tTG, or DGP will give you an indication of if your gut is healing. However, as you get older, healing is not so assured (and a repeat endoscopy is a good idea).
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