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. New government commissioned report says that everyone over the age of one should have a daily intake of Vitamin D of 10ug per day to protect bone and muscle health, which can mean supplementing, particularly during autumn and winter. Vitamin D helps contribute to several important functions in the body. It contributes to: The maintenance of normal bones and teeth The maintenance of normal muscle function The normal function of the immune system,helping your body fight off infection The absorption/utilisation of Calcium and Phosphorus Normal blood calcium levels Vitamin D also has a role 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. New government commissioned report says that everyone over the age of one should have a daily intake of Vitamin D of 10ug per day to protect bone and muscle health, which can mean supplementing, particularly during autumn and winter. Vitamin D helps contribute to several important functions in the body. It contributes to: The maintenance of normal bones and teeth The maintenance of normal muscle function The normal function of the immune system,helping your body fight off infection The absorption/utilisation of Calcium and Phosphorus Normal blood calcium levels Vitamin D also has a role in the process of cell division