I've never had my Vitamin D checked EVER -until May 2011. I'm indoors most of the winter months due to nasty weather. During the summer my Dermatologist says use sun-screen.
It was a very low level of Vitamin D..29. Yikes! My Endo doctor has been giving me instructions on how to increase. Can't win around here.

She checks my low Thyroid and low sugar levels too.
She is a very good doctor. It's me with the low everything but BP. which goes very low and then to moderately high in a wink.