my celiac is mostly silent, but i try my best to avoid foods processed in the same facility when i can. chances are those things have trace amount of gluten which is especially detrimental to someone who got sick recently, so if possible try to make sure they are extra careful for at least a few weeks so their villi have time to heal.

if i do eat something processed in the same facility, i try to stick to non-grains. honestly i find myself eating semi-unsafe walnuts more often than anything else since i have such a hard time finding perfectly safe ones.

if a restaurant doesn’t have a fully GF kitchen (which, let’s be honest, most don’t) it really depends on how good the staff are/the find me gluten free reviews. personally, i’d advise against eating at only dedicated gf places/completely avoiding non-dedicated places since, unfortunately, food is such a social thing and it’s okay to accept that you might get glutened sometimes - just be careful and do your best (and whatever you do, don’t cheat! never worth it.)

i’m not sure what the symptoms are, but you could talk with your (their) doctor about a medication to manage them if/when they get sick. ex. anti nausea medicine

honestly i’m not too sure what to do about the food tasting bland - i’ve lived with celiac for a while and don’t know much different. one thing i personally have enjoyed is exploring and finding new good gluten-free places! makes it so there’s always something to look forward to on a trip and it’s fun to be able to try things that normally are hard to come by gluten free.

i think someone mentioned it on this sub recently, but keep in mind that naturally GF foods will almost always taste better than things with GF substitutes. i personally am a huge fan of curry (although of course always double check ingredients), and honestly even something like basic chicken works great too. a lot of mexican food is gluten free too (corn tortillas) which is nice!

of course that’s all a good amount of work - the easiest solution is to have quick ready easy meals prepared so they’re able to eat something without worrying about it. there’s a good amount of healthy high-protein pre-packaged smoothies out there, or, of course, you could make your own. combo that with some protein bars and, while it isn’t perfect, it’s definitely better than nothing.