A friend of mine has been having issues with her kidneys - UTIs turned into kidney infections with bleeding, took antibiotics to get rid of them, but is very prone to recurrent infections and even when infection free seems to have sensitive kidneys. Do you all know any foods, in addition to cranberries of course, that are known to be especially good for kidney problems? She has been to the doctor and had imaging done of her kidneys, and they appear to be technically ok, but I'm wondering if there are any foods that could help tune them up so to speak? TIA!