This is one of the most important discussions we can have at this time. Vitamin D is now confirmed by the medical experts to be important for healthy immune system function. We have confirmed that as many as 80% of Americans are deficient in vitamin D. We have confirmed that people with low levels of vitamin D are more at risk for infections and are more at risk for serious complications, hospitalizations and death*. Vitamin D has emerged as one of the most important nutritional supplements for this time and for all time going forward. The verdict is in: you need to take supplemental vitamin D*.