Recent research has indicated that a large percentage of the population suffers from vitamin D deficiency or insufficiency.  This is a result of lack of adequate nutritional intake and exposure to sunlight compounded by the frequent use of sunscreens, which not only block harmful UV rays, but beneficial vitamin D as well.

The principal function of vitamin D is to promote calcium absorption in the gut and calcium transfer across cell membranes, thus contributing to strong bones and a calm, contented nervous system. It is also well recognized that vitamin D aids in the absorption of magnesium, iron and zinc, as well as calcium. Adequate vitamin D levels contribute to a healthy immune system, promoted muscle strength, and protection against oxidative stress and inflammation.