Research suggests that everyone over the age of one should have a daily intake of atleast 10ug of vitamin D per day to protect bone and muscle health. Vitamin D3 is produced in our bodies underneath our skin as a reaction to sunlight exposure. Vitamin D helps to contribute to the maintenance of normal bones and teeth, muscle function and the immune system, helping your body fight off infection. Additionally, Vitamin D supports the absorption/utilisation of calcium and phosphorus thus helps in maintaining normal blood calcium levels.