I just read in a nutrition book (that wasn't about a raw diet) that very high levels of potassium that can occur from eating too much fruit and juices will deplete calcium and magnesium. I just want to suggest to anyone starting a mostly fruit diet to test for calcium/magnesium periodically. (It's probably a test most people get anyway. I don't go to the doctor in general, but I don't know what most people do.)
Also, I'm just wondering if anyone who has been on a high fruit diet for a long period has been tested for calcium/magnesium levels and calcium excretion, and if it was normal.