Vitamin D is normally obtained from the diet or produced by the skin from the ultraviolet energy of the sun. However, it is not abundant in food.
As more people avoid sun exposure, Vitamin D supplementation becomes even more necessary to ensure that your body receives an adequate supply.
Vitamin D3 is important for strong bones and teeth. It also plays a major role in healthy cell development and helps keep the immune system strong. Vitamin D3 has also been shown to promote muscle health, breast health and colon health.
It is not always practical to get your Vitamin D from sunshine and quite difficult to get it from diet alone. So for many people, a Vitamin D supplement is a practical way to ensure adequate levels of this important protector are always avaialble in your bloodstream.
Recent literature also shows most calcium supplements have to little Vitamin D to be effective, and some of them use synthetic Vitamin D2. A much better form is natural D3, which stays in your system longer and with more effect.