If you havne't seen the latest post by the professor on VitaminD, it's worth reading. More proof of how VitaminD works.

http://www.overcomingmultiplesclerosis. ... ontrol+MS/

Two recent studies have been published further supporting the OMS position on maintaining a vitamin D level in the band of 150-225nmol/L

If you are in the US and get your results in ng/mL, this means you want to be between 60-90ng/mL