If you're eating dairy products, I very much doubt it.

Yes, but I would presume that's for people who aren't eating enough calcium in their diet. The way I'm taking calcium and other essential nutrients, hell, I don't even need anything added to my water on a fast.....

Calcium from natural sources, like cheese, canned salmon, sardines and certain veggies is always best.

I've been told repeatedly that if you are eating whole foods and including a variety of meats and greens, you do not need to add any calcium. We tend to not absorb calcium well, or if we do, we don't have the directions to tell it properly where to go. The D3 helps to absorb it. The K2 (M7 form) helps it to route to where it needs to go (bones, muscles, etc.). The magnesium and potassium help it to get there, and boron and zinc help it to stay in the bones and such, rather than get pulled back out or drift out through poor cellular barriers. It's all in a balance.

In my experience, calcium and potassium are the two of these that aren't generally required to be supplemented, as enough is still generally present in whole foods. Some others may be present your additional food choices, depending on the variety of your food intake. Others are very difficult to find in foods anymore (like Magnesium, due to soil depletion, pesticides, GMOs, etc.).

But above all, the reason so many people are deficient in calcium is NOT due to lack of intake, it's due to poor absorption and routing and nutrients...

Edited to add: Dr. Berg has some videos on this, but I don't have any links at hand.