Some people like to argue with vegans that we do not get enough calcium in our diets because we don’t eat dairy. However, a group of vegan Buddhist nuns allowed themselves to be studied along with non-vegan women. The outcome was that the vegan nuns had the same bone density as the non-vegans.
“For the 5% of people in Western countries who choose to be vegetarians, this is very good news,” said Professor [Tuan] Nguyen. “Even vegans, who eat only plant-based foods, appear to have bones as healthy as everyone else.”
“Bone health in vegetarians, particularly vegans, has been a concern for some time, because as a group they tend to have a lower protein and calcium intake than the population at large.”
“In this work we showed that although the vegans studied do indeed have lower protein and calcium intakes, their bone density is virtually identical to that of people who eat a wide variety of foods, including animal protein.”
This is interesting because so many people relate healthy bones to high levels of calcium found in dairy products. But this study shows that you can follow a vegan diet and still get enough calcium to make your bones strong.
Vegan Buddhist Nuns Have Same Bone Density As Non-vegetarians: Buddhist Channel
Ahimsa 
April 18, 2009 at 11:05 pm
I can attest to this also. i have been a vegetarian for many years and over the last three, have had low dairy consumption. My bone density has been measured several times and it was fine.
Foods such as spinach, turnups, chard, kale, broccoli, cabbage, and others are good sources of calcium.