Traditionally we have been told that in order to strengthen our bones we must increase our consumption of dairy products. The problem with dairy products is that in addition to calcium, they have a lot of phosphorus. This is essential, but in excess competes with calcium and prevents it from set correctly in the bones. In other words, dairy products are not only expendable, they can also be counterproductive.
But calcium is not only in dairy products. The vegetable diet is ideal for osteoporosis. There are vegetable sources of calcium that are better assimilated than dairy products.