Most people I have asked do have allergies, for me it's egg whites (The white part of an egg), I can still eat the yolk though. The side effects aren't deadly, but "Unpleasant" if you know what I mean.
[spoiler]Lots and lots of bathroom time[/spoiler]
[spoiler]Allergies suck.[/spoiler]
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If you do have an allergy, make sure you don't have a reaction otherwise you will be sued by the Fine Brothers.