@fritz2, in the USA it is extremely rare for maltodextrin to contain wheat, although technically, according to the FDA, it can. Various celiac support groups over the last few decades have contacted the 3-4 biggest USA manufacturers of it to discover that corn is almost always used, rather than wheat. The sugar in the vitamin water, however, may have contributed to your gut issues.    

Thanks for this update, and it is scary that drug manufacturing is being outsourced to India, a country that is notorious for having very little, or extremely relaxed business regulations. 

Just so you know GliadinX is not supposed to be used in place of a gluten-free diet, and may only be able to break down small amounts of gluten in the stomach. Small amounts might mean some wheat bread crumbs on your scrambled eggs at a restaurant. I'm not sure how your taking it, but I can say that I used to get glutened ~30% of the time when eating out, but now if I take a couple of GliadinX shortly before I eat a restaurant meal I no longer have issues, even though I suspect that the cross-contamination issues are likely still present in the restaurants I'm at. It won't work with large amounts of gluten, which they disclose on their website--and full disclosure, they are a sponsor here, but that is not why I'm responding.

No everyone with DH has issues with iodine, but some do, so it's good to be aware of this just in case you fall into that group.

@Parkrunner Your journey with undiagnosed celiac disease highlights how easily this condition can be overlooked, especially when symptoms are mild or mistaken for other issues. It’s frustrating that it took decades—and serious complications like osteoporosis—before getting answers, but it’s inspiring to hear how much your health has improved since going gluten-free. The fact that you’re running again, sleeping better, and avoiding medications in your 70s is a testament to the power of proper diagnosis and dietary changes. It’s also a good reminder that celiac can manifest in so many ways (like your arrhythmia, muscle cramps, and night sweats) and that food intolerances, like lactose, often go hand-in-hand. Your experience gives hope to others—even after years of undiagnosed damage, healing is possible. Keep enjoying that gluten-free, active life—you’ve earned it!