Vitamin D is best-known for its role in maintaining bone health through the regulation of calcium metabolism and bone mineralization. (1) Yet its effects extend far beyond that – Vitamin D is involved in several key mechanisms within the body including gene expression, regulation of immune responses, and skeletal muscle function. (1) All of these amazing functions within the human body have inspired much research on vitamin D, with many observational studies finding low-levels of vitamin D to be correlated with a higher risk of developing a variety of medical conditions - from fractures to cancer. However .....