Calcium and vitamin D supplements: Good, bad, or neutral for cardiovascular health?

Evidence about the cardiovascular effects of calcium and vitamin D supplements has been mixed. Although some studies suggest that taking calcium supplements may raise heart disease risk, others do not. Low blood levels of vitamin D have been linked to a higher risk of heart disease. But taking vitamin D supplements does not appear to lower that risk. Some evidence hints that taking calcium and vitamin D together might slightly increase the risk of stroke. However, the largest study to date found no increased stroke risk. And there is no evidence that food sources of these nutrients have any harmful effects on heart health.