Annual testing of vitamin D serum levels and functional activity

The correlation between vitamin D and bone health is well-recognized by the medical community. However, its role in immune health is not nearly as appreciated.  The functional importance of vitamin D is deep-rooted in human evolution. When humans in Africa lost their hair, their skin darkened to protect them from sun burn and skin cancer. As humans migrated to Europe and Asia, skin pigmentation lightened to facilitate UV-B-induced vitamin D production needed not only for bone health but for…