I posted a reply to your main link. I think you overestimate the ability of the tests to rule out issues caused by strange interactions with food and/or constit

I posted a reply to your main link. I think you overestimate the ability of the tests to rule out issues caused by strange interactions with food and/or constituent components of food. I think you are referring to 1) genetic tests for celiac genes, 2) IgA tests, and/or 3) biopsies for flatten villi. These can rule out celiac specifically, but cannot rule out a variety of other issues that can be a result. (My evidence of that you may not find convincing, but it comes from discussions with several gastroenterologists and rheumatologists that I've worked with).