Vitamin D contributes to: Normal blood calcium levels The maintenance of normal bones and teeth The maintenance of normal muscle function The normal function of the immune system And is involved in the process of cell division Vitamin D3 is produced in our bodies underneath our skin as a reaction to sunlight exposure. Other natural sources of Vitamin D include salmon, mackerel, sardines, milk, eggs and liver. A daily vitamin D supplement may be beneficial if consumers are of Asian origin, are housebound or rarely outdoors, cover all of their skin when outdoors or eat no meat or oily fish. Vitamin D helps contribute to several important functions in the body: Vitamin D regulates the amount of calcium and phosphate needed to keep bones and teeth healthy. A recent UK Government report (July, 2016) recommended that everyone would benefit from a daily dose of Vitamin D. Vitamin D contributes to: Normal blood calcium levels The maintenance of normal bones and teeth The maintenance of normal muscle function The normal function of the immune system And is involved in the process of cell division Vitamin D3 is produced in our bodies underneath our skin as a reaction to sunlight exposure. Other natural sources of Vitamin D include salmon, mackerel, sardines, milk, eggs and liver. A daily vitamin D supplement may be beneficial if consumers are of Asian origin, are housebound or rarely outdoors, cover all of their skin when outdoors or eat no meat or oily fish. Vitamin D helps contribute to several important functions in the body: Vitamin D regulates the amount of calcium and phosphate needed to keep bones and teeth healthy. A recent UK Government report (July, 2016) recommended that everyone would benefit from a daily dose of Vitamin D.