You'll find many varying opinions of what the best source of calcium is. Some think dairy is best. Others think it isn't, like this article states: http://www.hsph.harvard.edu/nutritionsource/what-should-you-eat/calcium-and-milk/index.html. They think you're best off getting calcium from non-dairy sources, like leafy greens, broccoli, almonds (or almond butter for us with sensitive guts), and oranges. And still others think bone broths are your best bet. Then you have all the debate over what calcium supplements are best: carbonate, citrate, etc.
Personally, I just try to get some calcium from all of the above sources. That way I'm covered
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