Vitamin D regulates calcium and phosphate in the body, which keeps bones and muscles healthy as well as facilitating normal immune system function. Without sufficient vitamin D, bones can become thin, brittle, or misshapen and lead to increased risk of osteopenia or osteoporosis.
 
Vitamin D is essential to a properly functioning nervous system as it aids in carrying messages between the brain and every other body part. Studies have shown that adequate amounts of vitamin D in the body can decrease pain and balance disturbances to those suffering from nerve damage.
 
It is estimated that about 1 billion people worldwide have a Vitamin D deficiency can lead to muscle weakness, pain, fatigue and even depression. 
 
In addition to its primary benefits, research suggests that vitamin D may also play a role in: reducing your risk of multiple sclerosis, decreasing your chance of developing heart disease, and even reduce your likelihood of developing the common flu!