Calcium supplements may increase the risk of kidney stone recurrence
The effect of supplementation with calcium and vitamin D on the risk of kidney stone formation remains unclear. according to a new study. Patients who took calcium supplements had lower total calcium in their urine while blood levels were unaffected. However, these patients also had a faster rate of kidney stone growth suggesting that the mechanism of calcium supplementation on stone formation may not be straightforward
these results suggest that supplemental, as compared with dietary, calcium may worsen stone disease for patients who are known to form kidney stones.