Recent research has identified the importance of vitamin D to health. Sunlight is necessary for the synthesis of vitamin D3, which is produced underneath the skin following sun exposure. Vitamin D is also found naturally in salmon, mackerel, sardines, milk, eggs, beef and liver. Consumers should consider taking a daily 10mcg vitamin D supplement if they are of Asian origin, rarely get outdoors or are housebound, wear clothes that cover all of their skin when outdoors, or eat no meat or oily fish. Functions of Vitamin D: Vitamin D contributes to the normal absorption /utilisation of calcium and phosphorus Vitamin D contributes to normal blood calcium levels Vitamin D contributes to the maintenance of normal bones Vitamin D contributes to the maintenance of normal muscle function Vitamin D contributes to the maintenance of normal teeth Vitamin D contributes to the normal function of the immune system Vitamin D has a role in the process of cell division.