Credit for this post goes to Kacer.
A decent range is 45-55 for vitamin D, unless you have cancer then should be more in the 80 range. For supplements, I recommend Puritan's Pride Vitamin D 10,000IU supplements.
Vitamin D deficiency
My vitamin D level was at 12, which is very low. A vitamin D level of 25 is already considered to be critically deficient, and anything under 32 is dangerous... ...