Researchers frmo Aucklanf University in New Zealand and Aberdeen University looked at data from the Women's Health Initiative, an American observational study of women who had been through the menopause.
Looking only at those who were not taking supplements beforehand, they found that those taking one gram of calcium daily and 400IU (0.01 milligrams) of vitamin D, were at a 21 per cent higher risk of having a heart attack over seven years. They were also at a 20 per cent increased risk of having a stroke.
Cathy Ross, Senior Cardiac Nurse at the British Heart Foundation, described that as a "modest increase" but said patients with concerns should not stop taking them, but talk to their doctor instead.
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