Calcium is an essential mineral and a major component of teeth and bonesCalcium contributes to normal blood clottingneeded for the maintenance of normal bonescontributes to normal energy-yielding metabolismcontributes to normal muscle functioncontributes to normal neurotransmissioncontributes to the normal function of digestive enzymeshas a role in the process of cell division and specialisationis needed for the maintenance of normal teethVitamin D contributes to normal absorption/utilisation of calcium and phosphoruscontributes to normal blood calcium levels (size L)