The common existing food allergens are Peanut flour, peanut butter, powdered egg white, Powdered/fresh
milk Soy
milk, soy flour Wheat breads, flour etc. But as you are allergic to pigmented fruits, you may have to avoid other fruits like grapes, papaya, beet root etc.
As allergic reactions are IgE mediated, blood tests will show increase in these levels secondary to a food allergy.