What is the normal vitamin B12 level range?

Ranges for normal vitamin B-12 levels vary from lab to lab. In general, normal vitamin B-12 levels range from 110 to 1500 picograms per milliliter, according to WebMD.

A range of 81 to 1107 picomoles per liter is also normal for vitamin B-12 levels. Vitamin B-12 levels are tested with a blood sample taken from a vein in the arm. This test is usually painless and may result in some mild discomfort or slight bruising at the sample site. High levels of vitamin B-12 can occur in obese or diabetic individuals, or in certain cases of leukemia and liver disease, explains WebMD. Low levels generally indicate a vitamin B-12 deficiency.