I found it interesting that calcium ingested from supplements and not natural foods can cause problems.
For more details after reading my summary, click on the link below.
From The New York Times Health section:
Calcium supplements, as opposed to the natural calcium found in food, may be bad for the heart, a large new study confirms.
The study found that taking extra calcium may raise the risk of a heart attack.
People who got their calcium almost exclusively from supplements were more than twice as likely to have a heart attack compared with those who took no supplements.
The researchers speculated that taking calcium in supplement form causes blood levels of the mineral to quickly spike to harmful levels, whereas getting it from food may be less dangerous because the calcium is absorbed in smaller amounts at various points throughout the day.