There has been tenderness in my lower back in the area of my kidneys for months. Fresh aloe vera gel, whole lemons in smoothies, and high dose ascorbic acid w/wo baking soda seem to have been the cause. I tried fresh lemon juice, Ted's lemon alkalizing remedy, baking soda in water, and raw apple cider vinegar with no improvement. At times it felt like a small stone may have moved.
Fresh raw purple cabbage (with fresh lemon juice and miso dressing) eliminated the discomfort the same day I ate it. About two cups of cabbage. It also increased urine output.