Cranberry juice can be very helpful if you’re suffering from kidney disease. The reason why cranberry juice works so well is because it is acidic, and this helps your kidneys filter toxins better, even when they are failing. The point, at which chronic kidney disease becomes irreversible, is probably around CKD stages four and five. At this point, a lot of doctors would recommend alternative therapies and kidney transplantation surgery. If you are still in stage 2 or 3 of chronic kidney disease, this means that there is still hope of reversal. You should do everything you can to follow a proper diet, created to reverse your CKD.