Vitamin D is a fat soluble nutrient that is essential for our body to function optimally. This vitamin is also critical in preventing infections combatted by the immune system. It helps the body absorb calcium, which is important for building strong bones.
There are two types of vitamin D: vitamin D3 and vitamin D2 with the main difference being that vitamin D3 is more potent in supplementation form. Vitamin D3 is also the type produced by your body when exposed to sunlight.