New Vitamin D Discussion - Let's start with "co-factors"

The way that vitamins and minerals work in your body is interconnected. How well vitamin D works depends on the amount of other vitamins and minerals that are present in your body. The other vitamins and minerals needed to help vitamin D work well are called cofactors.

http://www.vitamindcouncil.org/about-vitamin-d/vitamin-d-and-other-vitamins-and-minerals/

I like to read up on vitamins so I can talk to my doctor about them. Thank you for the post.