- Contributes to normal muscle function - Maintains normal bones and teeth - Contributes to reduction of tiredness & fatigue - Supports normal function of the immune system **Calcium** contributes to normal: - blood clotting - energy-yielding metabolism - muscle function - neurotransmission - function of digestive enzymes - bones and teeth - regulation of cell division and differentiation **Magnesium** contributes to: - reduction of tiredness and fatigue - electrolyte balance - normal energy-yielding metabolism, normal - nervous system function - muscle function - protein synthesis - psychological function - maintenance of normal bones & teeth - role in the process of cell division **Vitamin D** contributes to normal: - absorption/utilisation of calcium & phosphorus - blood calcium levels - maintenance of normal bones, muscles & teeth - role in a process cell division - immune system function