Questions regarding allergy to berries
I know this is a medical question but I also know there are a lot of very learned people here, so I am going to ask. One of my sons has an allergy to all berries. We have tested him with skin tests for common berries and with applied kinesiology for the more rare berries. I am stumped as to what he is actually allergic to.
He's allergic to the normal berries such as strawberries and cane berries, but now that my Illinois Everbearing mulberry and my gooseberry are ripening fruit I tested him with these. I really thought he would not be allergic to mulberries, but when I discovered he was I tested him with figs also.
He is not allergic to stone fruit, so thankfully cherries are okay. Also cranberries and grapes are fine.
I took him to a naturopath that was able to eliminate even cat allergies, but so far the allergy to berries persists.
So my main question is, what do the berries he's allergic to have in common?