These minerals are stored in the bones and soft tissue of the body. Magnesium is also involved in normal energy production. Cal-Mag Coral Complex provides Calcium and Magnesium in the preferred 2 to 1 ratio. Vitamin D3 has been added to aid Calcium absorption. Besides calcium and magnesium, Cal-Mag Coral Complex also delivers more than 70 trace mineral which are also essential to the body functions.