Industrial Grade Potassium Magnesium Citrate is supposed to be very beneficial in prevention of recurrence of renal stone. The Potassium Magnesium Citrate may be used to control uric acid and Cystine kidney stones. The Potassium Magnesium Citrate is a chemical agent used medicinally as a saline laxative and is used to empty the bowel prior to a surgery or colonoscopy. The Industrial Grade Potassium Magnesium Citrate is also used as a magnesium supplement in pills.