Pomegranate juice is widely used to treat ulcers and diarrhea. It is also beneficial in treating kidney stones as it is rich in antioxidants. Antioxidants reduce oxidative stress associated with kidney stone formation. Oxidative stress occurs when there are too many free radicals or molecules with an odd number of electrons, making them reactive. When antioxidants come into contact with free radicals, they give free radicals an electron, stabilize it, and thus reduce oxidative stress.
A study published in the journal Urolithiasis found that people with recurrent kidney stones who took 100 mg of pomegranate extract for 90 days resulted in decreased urinary calcium oxalate levels. The oxidative stress in these people also decreased.