/ck/ - Food & Cooking

Please help me figure this out it’s starting to piss me off.
I have food allergies that I’m aware of (peanuts, tree nuts, some legumes like peas and lentils) but I’m usually alright to eat out with no worries.
But EVERY fucking time I go to a shitty “authentic” Mexican restaurant, you know the ones that bring out chips and salsa and are all nearly identical to one another, I have allergic reactions, usually after eating chicken or lettuce. Is there some weird preservative that cookie cutter Mexican restaurants use or an ingredient that is known to cause problems with people with an intolerance that I’m not aware of? Google searching this only brings up faggy mother-baby sites.
Any experience with this or something similar?

Do you have any food allergies?

Why do some kids grow out of certain allergies?