Is Kombucha Good for Kidney Stones fermented tea rich in probiotics and antioxidants, which may support overall digestion and detoxification. However, when it comes to kidney stones, there is limited scientific evidence proving that kombucha can prevent or treat them. Some varieties contain oxalates, which may increase the risk of certain kidney stones if consumed in excess. People prone to kidney stones should drink it in moderation and consult a healthcare professional before adding it regularly to their diet.