Years ago, I suddenly developed oral allergy syndrome and found that I couldn't eat raw fruit or veg ...in fact I almost went into anaphylactic shock from a carrot juice until I vomited it up. There was some relief from charcoal, but until I found a cure, I cooked everything.
Eventually I freed myself from this allergy by adding half a cup of cooked brown rice to my diet every day for six weeks. It's a medicine. I like to cook it 40 minutes. Good in smoothies, salads, soups it can be added to everything and because it seems to boost my immune system, I still eat brown rice at least once a week.