One-half cup of lemon juice concentrate added to drinking water over the course of the day is a preventive therapy for calcium oxalate stone formation.

Make your own by mixing lime or lemon juice with water and using a sugar substitute if needed. “We believe that citrate in the urine may prevent the calcium from binding with other constituents that lead to stones,” said Dr. Jhagroo.

Credit:https://my.clevelandclinic.org/health/multimedia/questions