Can calcium supplements be good for your bones and bad for your heart? A study published online (July 30) in the British Journal of Medicine (BMJ) revealed that people who took calcium supplements had a 30 percent higher risk of heart attack than people who did not take the supplements. Since women are generally advised to take calcium supplements after age 50 to reduce the risk of fracture, does this mean you have to choose between protecting your bones and protecting your heart? Lets take a closer look at the issue. The BMJ analysis examined 15 clinical trials with a total of 12,000 participants, who took 500 mg of calcium or more daily for at least one year. They also consumed calcium through foods.