I have issues with certain health suppliments. And this is one of them. Excess calcium in the blood can damage your heart by causing a condition known as hypercalcemia, a nasty condition I learned about during my brief but spectacular stint in nursing school.
So how can you get calcium in your diet without taking suppliments? Through natural food sources. Although dairy is a calcium source, I don't do dairy for two reasons: it's not paleo and I'm lactose intolerant. (although I do like to splurge on cheese every once in a while)
Although this is not a complete list, this link will give you a start in finding calcium rich foods.http://www.fatfreekitchen.com/nutrition/calcium.html
I have and still maintain that if you eat a healthy diet, you won't need suppliments. The trick is in learning what foods contain the nutrients you need to remain healthy.