What does a high B12 level in blood mean?
High levels of B12 is rare, however, it 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