Ok I'll start by saying I have MS so everyone knows. But starting in 2006 I started having low Vit D levels, we were living in Germany at the time in an area that was always gray and cloudy so I wasn't out in sun as much, but still,normal levels are between 20-50 and oftentimes in caucasians is as high as in the 70's according to my doc, mine was 8. I took 50,000u (huge dose)
twice weekly for a month or two and then a regular supplement.

That got my levels up and they have remained normal as recently as October, we have since moved back to the states and I am outside alot, however I just had my levels checked because I have been having severe aching and bone pain again, my level was less than 2!!! I think it was like 35 in October. So in less than six months it has nose dived.

I have no idea why this keeps happening and am supposed to talk to my doc about looking into why I seem to be having malabsorption issues. Until Jan I was on Rebif now Tysabri as of Tues...I do take alot of steroids. Wondering if it isn't med related? Not sure...anyone else?