Symptoms Returning : Diet Failure Or Normal? in Post Diagnosis, Recovery & Treatment of Celiac Disease Posted July 23, 2015 · Report to Admin It's also possible that prior "active" celiac disease can trigger other functional digestive disorders, even after transitioning to a strict gluten-free diet. I'm also in the camp of persistent symptoms despite a strict diet, and a top celiac doctor at the Mayo assured me of this. That said, as others have said above, serology testing can give you vital clues as to what's going on. Functional disorders tend to be the likely diagnosis only after diet contamination and other disorders have been ruled out. Are you able to decipher Japanese ingredient labels? That's essential to making sure your kitchen inventory is safe.