I find it interesting how many health articles refer to things like soy milk and orange juice as “sources of calcium.” Fortified foods might be one way to get calcium, but they are not natural sources and, for the following reasons, are probably not the best option for meeting your calcium RDAs.
Calcium doesn’t get as much attention as protein when it comes to vegan nutrition, yet calcium is something that vegans might want to pay better attention to. Recent studies do suggest that vegans had lower bone densities and are at higher risk of fractures. To get an idea of how vegans get calcium, I made six sample vegan meal plans and calculated the calcium in them. Even a healthy vegan diet did not always meet calcium RDAs of 1000mg/day. (see the infographic here)