I find it hard to believe that a human can be allergic to citrus or any human food. It is all about education. it is not the foods problem, it is the wrong habits.
I suggest you read my first schooling book written by a Md that cured 63,000 people with every disease know, with nothing but citrus. I have heard this story from most citrus allergic types and everyone soon is drinking gallons with GREAT PLEASURE!
Citrus is one of my very best herbs, if that can't be done, my informationm is of no value.