Both of these statements are true. But years of research have revealed that we need calcium for so much more. It is also needed to maintain several bodily functions such as the clotting of blood, the transmission of nerve impulses, the regulating of our heart rhythm and the absorption of necessary vitamins such as B12. There is a large number of alternative sources of calcium as opposed to dairy products. All green, leafy vegetables contain calcium.
Great sources are kale and collards, beets and turnip tops.
Although spinach contains calcium it also contains an enzyme that makes it less easily absorbed by the body. Other good vegetable sources of calcium are dried peas and beans, such as lentils and chickpeas. Most fruits, also, contain calcium. Oranges are a good source as well as concentrated fruits such as prunes, dates and figs. Raw nuts and seeds also provide calcium.