What Vitamin is Highest in your blood stream and lowest in February?

University of California, Irvine and Mayo Clinic have found that Vitamin D levels in the U.S. population peak in August and bottom out in February.
Low levels of vitamin D cam impair immunity, which is your bodies first line of defense against pathogens.
Even with food fortification, vitamin D levels in the population show a high level of seasonality due to the influence of sunlight.
The New England Journal of Medicine stated that over 1 BILLION people worldwide are deficient in Vitamin D.
In my book “New Vitamin Bible”. I recommend taking a supplement of natural Vitamin D, D3, in the amount of 1000 to 2000 iu daily.

by Dr. Earl Mindell