Originally Posted by mrsD

Some people have pain... we had one fellow with upper back pain.
He recovered with normalizing the D3.

You can have numbness or tingling on the face or around the mouth too, with low D.

There can be muscle issues, since calcium is needed for muscle contraction, and magnesium for relaxation. Both of these minerals are enhanced absorption with Vit D.

Low D. is thought to impair the immune system, so more frequent infections may occur when low. There are suggestions too about proper D levels discouraging cancer development (definite proof is still lacking on this one).

If you tested low, you should take it to normalize your levels.