Vitamin D is a fat-soluble vitamin, which can be created by the body when the skin is exposed to sunshine for a small amount of time. Certain factors such as the amount of melanin found in your skin, limited sun exposure and lack of Vitamin D in foods can deplete Vitamin D stored within the body over time. A lack of Vitamin D can lead to symptoms such as lethargy, tiredness, muscle problems, bone pains and mood changes.  

Vitamin D is important for a range of bodily functions, and supplementation alongside a healthy diet can contribute to the normal absorption and utilisation of Calcium and Phosphorus, which is important for the maintenance of normal bones and teeth. Vitamin D is also used within the body to maintain the normal functioning of the immune system, cell division, and helps maintain normal muscle function.