Yep, had my level tested and it was 11.
Doc put me on super high dose for awhile and then I supplement everyday with high doses I buy over the counter....6,000 per day. I am more religious about it during the gray, winter months. I am outdoors a lot in the summer and get more natural exposure.

They have also found the low D3 levels common in many other diseases as well.
Can't say I feel any better having brought my D level up, but I think it is not a "feel good" thing......its a health issue. Ignore all the Fed's recommendation of 400 iu a day, thats just plain stupid. Don't go less than 2000 iu's.