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.
There is no arguing that milk is a good source of certain nutrients. The main nutrient milk contains is fat, since it is meant to provide lots of energy for a growing mammal. But what about calcium? On the one hand, we’ve been bombarded with government health messages telling us to drink milk because it is a good source of calcium for growing bones. On the other hand, it is weird that humans are the only animals who drink mmilk after infancy, and also that milk-loving Western countries have so much osteoporosis. Vegan advocates will quickly tell you that milk depletes calcium from the bones.