Vitamin D is an essential nutrient our body needs. The most common benefit know is its role in bone health. However, there are several other benefits that you can obtain from getting enough vitamin D, like improving your immune system, decreasing your risk of chronic disease, and regulating your mood. One interesting fact about vitamin D is that even though it is called a vitamin, it is a precursor of a hormone. In this article, we will talk about the role of vitamin D3 and the benefit of taking it along with K2.