i am allergic to (to put it basically) meat but can still tolerate fish (almost)
i also have hayfever, am severly allergic to non-biological washing powders, most english and american cheeses, i cant bare to be around anyone with particually cheap purfume as one of the key ingrediants (lord knows which one) regually sends me into anaphalactic shock. which means my purfume collection is very small as i can only wear the really expensive ones.
i am also sensetive to latex aswell, eggs, most dairy products wheat and gluten and silicone based lubricant.
i found out about them though (very painful and dangerous) processes of elimination. i would definatly not recommend doing that to anyone else, but as my allergys came on quite suddenly about 3 years ago after i had some problems with my immune system the only way i could figure out what they would be was to do it through elimination.

and just like WildChild i am a healthy and happy young woman probebly because i am stupid healty with my diet because of my allergys