The Stone Free formula works on gallbladder stones too so it may be good for you to try it. :)
Do you know how to diagnose for kidney problems? If you aren't suffering from any mid-back pain; frequent urination; foamy urine; dark or pink urine; then you don't need to do anything for the kidneys except for the occasional parsley juice, making your diet more alkaline, lowering protein intake and drinking lots of water/cleansing drinks. :) Cranberry juice is good if there's any irritation like a urinary tract infection.