There have been several concerns about the safety of calcium supplements. One is that calcium supplements may increase your risk of heart disease by promoting blood vessel calcification. There are also concerns that calcium supplements may increase your risk of developing calcium-based kidney stones (13). However, the risk of these must be weighed against the risk of osteoporosis and the many complications it may cause. Overall, it’s ideal for you to get all of your calcium from diet alone. But, we know that the ideal isn’t always realistic. Because vegans tend to fall short on calcium intake, taking a calcium supplement while working towards increasing dietary calcium intake to a point where the supplement is no longer necessary may be the healthiest choice for bone health and overall health.