Vitamin D. You know you need it. But do you know why? Or how much? Or what it even is? If not, you’ve come to the right place.

Vitamin D is a nutrient that we not only ingest from food, but our bodies synthesize it from sunlight. Once active in the body, vitamin D becomes raw material for making the hormone calcitriol, which supports calcium and phosphorous absorption and bone health.

Additionally, Vitamin D supports hundreds of processes in our body. In fact, virtually eve...