I don't have specific on tolerances, but I do have an allergy response (cat hair, dog hair, tree pollen, flower pollen, grass pollen, housedust). And I have times when I suffer symptoms similar to IBS.
However, IBS-ness seems to happen when I am over-stressed mostly. So I can go through months of eating whatever I want (and usually being reasonably healthy diet, with lots of wine, cheese, meat, F&V etc), and then have a while of bloating, wind, diarrhea etc. Sometimes brassicas can make it worse, or hard egg yolks (I can always have them runny, or in scrambled/omlettes or baking for some reason), I avoid baked beans (not a huge fan anyway - same for marrowfat peas, but I tend to get farty after both too - nowadays I just avoid although would probably cope in small doses at times) but will eat French, broad and cannellini beans fine, or regular peas (just as long as not over-aged: I tend to buy petit pois but regular can be ok, but from the garden they need to still be quite wet in the middle and not gone to dry and somewhat floury taste stage). I LOVE sugar snap peas raw in my lunchtime salads.
I have also noticed that I tend to not eat a lot of bread or wheat. I have recently considered trying gluten free for me and DD (ASD/ADHD), but it would be hard to do given busy lifestyles and a need for some convenience foods a lot of the time. But I don't have a sandwich for lunch most days, and neither will she by preference. We both will eat some, mostly weekends though.
My DB has some awful food allergies - brassica family (he can tolerate a little now, as long as they are not too frequent or large portions), anything to do with a pig (sausages, bacon, pork etc - he can now eat a little pork so the odd sausage but still has problems with bacon), lots of E numbers etc. There was only 1 brand of (very expensive) crisps that he could eat as a child, mum used to make crisps for him on occasion (badly).
But it is easier in our family because we have some allergic reactions to things to say no. But then again, there is also an expectation that you will still eat everything you always did and that your eating habits (type or tastes, or salt/fat/seasoning levels etc) haven't changed in over 40 years!