Hello all, I am new to this group, although I have been lurking around here for quite some time. I have suspected my vitamin D levels have been low for a couple months, due to a foggy head, really bad concentrated and memory, bone pain, and nerve pain which seems to come and go (and I'm only 23!). Anyway, I finally got in with my dr, and get a blood test, and low and behold... they called back saying my vitamin D levels are low and to take 2,000 UI a day. So I go to pick up my results and they show my levels are 17.3ng. After reading other posts on here though, it seems maybe I should be taking more than 2,000UI a day. Should I call the dr and bring this up. Or should I go to a different dr? Or should I just stick with my 2,000UI?