here is a story from my side
i have a allergic reaction against
wallnuts
( i eat them 5 minutes later i get heavy breating problems with loud alien sounds and heavy heavy breating for about 2 hours .. then it completly disappears )
today i drink
belgian blond ale http://www.kufleikapsle.pl/taps/ (13 )
i suppose its this
http://beerlab.pl/#/piwo-butelka/rubio
and exactly the same symptoms
is the simple analysis the beer contains nuts ?
do i have to avoid all ( pale beers ? )
I know this is an old post- But the more I learn about in molecular gastronomy (and the more that is learned about this, from folks like Heston Blumenthal and the folks at the Harvard Food Sciences program where a lot of ground breaking research has been done over the last few years) the more I understand that it might not be the actual INGREDIENTS that are the same.... but the similar molecular COMPOUNDS that make up the ingredients that could cause a problem.
That's how food pairing are done these days, it's on the molecular level (for example chocolate and bleu cheese may sound gross, but they found out the several compounds overlap and work amazingly well together- Heston Blumenthal's chocolate bleu cheese lava cake is amazing.)
And with fermentation a ton of compounds are produced- So that beer might not contain nuts- but that recipe, that particular yeast strain, maybe at a certain temp, or in conjunction with the sugar produced by a certain grain could produce just enough of the same compound as found in whatever nut it is, to give people problems.
It's one of those things that are so complex, and food science is only now scratching the surface on it- where I think for people who have food allergies- it's going to be a crapshoot... you're going to have to learn which beers work for you, and which don't.. it may be a style- but it may be a beer style that's brewed slightly differently (maybe different temp) by two different breweries. So for example one Leffe Blonde might be fine, while another blonde ale might be problematic.
One of my friend's breweries now brews all their beers with an enzyme (I'm drawing a blank on the name right now) that prevents people with gluten allergies from getting sick from his beers. So his IPA may be perfectly fine for someone, but the bewpub on the next block may not be...
Something to think about.