Blackmores Total Calcium + Magnesium aids in the management of calcium deficiency states. It may assist in the prevention and/or treatment of osteoporosis. The levels of calcium and magnesium in this formula are in the desired ratio of 2: 1 Contains co-factors vitamin D3, vitamin K1 and minerals to aid in the absorption and function of calcium Calcium is the most abundant mineral in the body, and approximately 99% of the bodyâ€™s calcium exists in the bones.Â The major function of calcium is building and maintaining bones and teeth. Calcium is also involved in various metabolic roles such as nerve transmission, contraction of muscles and the regulation of heart muscle function.Both calcium and magnesium are essential for bone health, as well as playing important roles in healthy muscle and nerve function. The levels of calcium and magnesium in this formula are in the desired ratio of 2: 1.Vitamin D is essential for the absorption and utilisation of calcium.