Vitamin D contributes to the maintenance of normal bones, teeth, muscle function and immune function. Vitamin D contributes to normal absorption/utilisation of calcium and phosphorus.

The classic vitamin D deficiency disease is rickets. Yet as fear of sun-exposure has grown and lifestyles have become more sedentary, exposure to the sun has dropped dramatically and vitamin D deficiency and the incidence of rickets has surged. The skin cannot create vitamin D if covered in sunscreen or clothing, it is thought that a sun cream with SPF15 will reduce the skin’s ability to synthesize vitamin D by more than 95%.