Calcium supplementation -- without giving vitamin D at the same time -- appears to increase the risk of myocardial infarction, a new review of past research has shown.
Among studies of patients with or at risk of osteoporosis, those who received calcium supplements were about 30 percent more likely to have a heart attack than those who did not, Dr. Ian Reid, MD of the University of Auckland in New Zealand and colleagues reported online in BMJ.
"As calcium supplements are widely used, these modest increases in risk of cardiovascular disease might translate into a large burden of disease in the population," the researchers wrote. "A reassessment of the role of calcium supplements in the management of osteoporosis is warranted."
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