The Telegraph reported researchers in New Zealand found that calcium supplements may increase the risk of heart attack in healthy postmenopausal women.
1,471 postmenopausal women of average age 74 were randomly assigned to receive calcium supplement or placebo, followed for 5 years, researchers found heart attacks were more common in the women taking the calcium supplements. The report was published in the BMJ Online, the authors said the results are not conclusive but suggest that high calcium intakes might have an adverse effect on vascular health. Some experts in the field found the conclusion surprising and urged patients not to stop taking the supplements.
Source: "Vascular events in healthy older women receiving calcium supplementation: randomised controlled trial." BMJ 2008:394405257 published online, 15 January 2008 ( full text via Athens)
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