New study showing that supplemental Calcium increases heart attack risk by 30% That’s a huge amount! The study was done to see if the added Calcium provided heart benefits in addition to alleged bone improvement. So, weight bearing exercise and kale for everyone!! The issue seems to be that dietary Calcium from food provides protection for bones, but perhaps the supplements, not so much. It may have to do with spiking Calcium levels in the blood, or inability to absorb it when not in food.