What does a very high level of vitamin B12 indicate?
High levels of serum cobalmin may be a sign of a serious, even life-threatening, disease. Hematologic disorders like chronic myelogeneous leukemia, promyelocytic leukemia, polycythemia vera and also the hypereosinophilic syndrome can result in elevated levels of cobalamin. You are recommended to check with a doctor.
Cyanocobalaomin, Methylocobalamin, Vit B12