Everyone who is not in the practical Pharma Sales industry known as the rabid portions of the medical industry knows that Vitamin D is utterly important. We've talked about it here and on my "sister" podcast - Kimology 411, where Tyson co-hosts, over and over and over. Because that is how important it is. 
Yet, this....  Tyson did not know. 
A REAL distinction on the limits of natural Vitamin D production.