As other's have commented you've really fallen for it, yet despite your strong convictions, it's not clear that you understand basic biochemistry: > [Vitamin D

As other's have commented you've really fallen for it, yet despite your strong convictions, it's not clear that you understand basic biochemistry: > [Vitamin D] is so important that it is closer to a hormone than a vitamin. The difference between a vitamin and a hormone has nothing to do with importance. In fact, the article that you linked explains it so plainly that maybe you'll reconsider your authority on the subject and not present opinions so "unequivocally". > Vitamin D is not technically a vitamin, ie, it is not an essential dietary factor