Calcium Supplements Increase Risk Of Kidney Stone Formation

After reviewing urine collections and CT scans of 1,486 kidney stone patients, U.S.  researchers concluded that calcium supplements – but not foods rich in calcium – increase the risk of a recurrence of stones. Patients who took calcium supplements had lower levels of the components of kidney stones in their urine. However, they also had a faster rate of kidney stone growth. Vitamin D supplements, however, may help prevent stone formation.