Calcium is one of the most essential and important minerals in our body. It is also the most abundant, 99% is located in our bones and teeth. It is also used by almost every cell in the body including the heart and nerves and is necessary for muscle contraction and for the development and maintenance of bone structure. Although we imagine our bones are permanent, they are actually being constantly renewed throughout our life and replaced with bone tissue. In fact, our entire skeleton is renewed approximately every seven years. If we do not consume calcium in our diet, our body takes the necessary calcium from our bones to use for other essential functions. This can result in brittle or porous bones, broken bones, low bone density and weakness - especially in later life. Chlorella demonstrates advanced bioavailability of calcium and other important co-factor minerals including magnesium.