I had to do this before. Just told them that I wasn't feeling well, and they wanted to give attitude, but it was either that or be completely useless to them.
LOL!!! Good point. Kinda like all these food allergies here, wtf.............Chris Rock: "They tell you, 'don't eat red meat, red meat'll kill ya', sheee-it, don't eat the GREEN meat! If you lucky enough to live where you can get a good steak, bite the SH!T outa it!!!"