What do you get in vitamin d?

Vitamin D aids in building and maintaining bone mass-therefore helping you to absorb Calcium; a necessity for your bones. If one has low levels of Vitamin D, then you may be at a greater risk for diseases such as Arthritis. When the sun's UV-B rays hit a person's skin, a reaction occurs allowing skin cells to produce Vitamin D. Sometimes, even with a sufficient amount of sun exposure, your levels may be low, and that is when medication may be needed to "boost" your levels manually.