The Short Version: The calcium levels are only what naturally occur in the ingredients (a small amount!)

The Long Version: The reason for this is Organic standards dictate that we aren’t able to fortify with calcium, the same way some other plant milk companies can.
Calcium is a mineral and comes from the ground! We can obtain all the nutrients we need from our food. Oranges, almonds, broccoli, bread and even baked beans are all great sources of calcium!