The controversy over calcium supplements
comes from a study that suggested that calcifications (calcium buildup) in coronary arteries may occur more frequently in women taking calcium in tablet form.
The number of heart attacks was small, and the study wasn't designed to look at heart attacks, but the results are reassuring in view of claims that calcium supplements
harm the heart.
, he says, should be considered only if you do not get the recommended daily amount of calcium through diet.
The mechanism by which calcium supplements
may contribute to heart disease is thought to involve the accumulation of calcium in the arteries, which we know can occur over time.
Although the data showed women who took calcium supplements
had a lower mortality risk, there was no statistical benefit for men.
Most men who take calcium supplements
tend to be older and frailer and have other health issues, and there's no guarantee that the statistical analyses, however well intentioned, can adequately account for and remove these confounders.
said this study should not cause anyone to stop taking calcium supplements
, and NPA has long recommended consumers discuss calcium intake with their healthcare professional.
A safe alternative to calcium supplements
is to consume calcium-rich foods, such as low-fat dairy foods, beans, and green leafy vegetables, which contain not only calcium but also a cocktail of essential minerals and vitamins," she wrote.
in doses greater than 1,000 to 1,300 mg per day for adults may increase risk.
Researchers found that older adults who were given vitamin D and calcium supplements
were 9 percent less likely to die over three years than those given placebo pills.
The study, in the April 19 issue of BMJ, suggests that calcium supplements
may cause "abrupt" increases in blood calcium levels within hours that can affect platelet function or endothelial cell activity.
The researchers used data from 15 studies in which one group received calcium supplements
and one group did not.
PEOPLE taking calcium supplements
have about a 30% higher risk of heart attack, research out today suggests.
The American Association for Cancer Research 101st Annual Meeting 2010 was the site of a presentation concerning the finding of a protective effect of vitamin and calcium supplements
against breast cancer.
may increase the risk of heart attacks in older women, a study warns.