I have been using Xango's Mangosteen juice for about 9 months. I started taking it while I was pregnant to prevent the headaches and migraines I have always dealt with for my whole life. I used to get 6 to 8 migraines per month and at least one or two headaches per week. Now on the juice I have NO headaches and get less than one migraine per month. and in response to your specific question, I have had two major kidney stone episodes in the past and went to the ER for pain killers and had to wait for the 5-6mm stones to pass on their own. Since I've been on the juice I have passed two stones without much pain. I thought I had a urinary tract infection for a couple days before I passed the first one, and then 3 days later I passed a slightly smaller stone. I never had that horrible unrelenting back pain with these stones, they just came right out! Amazing!!! It is totally worth the money for the juice, I LOVE it. Good luck to you, I hope you try it!