Vitamin D helps the body absorb calcium and phosphate from our diet which are vital to healthy bones, teeth and muscles.
Our body creates vitamin D when exposed to direct sunlight. There are a number of factors that determine how much vitamin D your body makes, such as your skin colour, how long you spend in the sun, or how much skin you have exposed.
We also get some vitamin D from certain foods, including oily fish such as salmon and sardines, as well as red meat and eggs. Vitamin D is also added to all infant formula milk, and some foods such as breakfast cereals, fat spreads and non-dairy milk alternatives.