Calcium supplements cardiac safe A new joint clinical guideline, published online October 24, 2016 in the Annals of Internal Medicine, from the National Osteoporosis Foundation and the American Society for Preventive Cardiology states that dietary and supplemental calcium are safe for cardiovascular health if consumed in recommended amounts. The recommendation applies to calcium consumed either alone or with vitamin D that does not exceed the National Academy of Medicine's tolerable upper intake limit of 2000 to 2500 mg/day. Discontinuation of supplemental calcium for safety reasons is not necessary and may be harmful to bone health when intake from food is suboptimal A 2010 meta-analysis concluded that calcium increased the risk for myocardial infarction and stroke, while a 2011 meta-analysis concluded that calcium had no statistically significant effects on coronary heart disease events or mortality. Dietary calcium should be recommended over supplements. Calcium intake over the recommended dietary allowance is not better than intakes that just meet the allowance.