Vitamin B12 is crucial to your health. Do you get enough?

Vitamin B12 plays a key role in some of the body's most essential functions, from making red blood cells and DNA to supporting the nervous system. 

This Vitamin B12 Test measures the level of vitamin B12 (also called cobalamin) found in your blood. A vitamin B12 deficiency can cause fatigue, muscle weakness, intestinal problems, numbness, memory loss and anemia. If left untreated, a B12 deficiency may lead to irreversible nerve damage. Elevated levels of vitamin B12 may indicate health conditions such as liver disease or diabetes.