2024-10-082024-10-082014-12-011304-9054https://doi.org/10.4274/jcp.79188https://hdl.handle.net/11452/46066Vitamin B12 is essential to all cells in the body. Both high levels and low levels of vitamin B 12 are significant. High serum cobalamin (vitamin B 12) levels are found particularly in hematological disorders, solid tumors, autoimmune diseases, renal diseases and infectious diseases; and this elevation is associated with prognosis in some of these diseases. High levels of serum vitamin B 12 should be taken into consideration and more studies should be performed on this issue.enBlood-levelsCobalaminFolateHomocysteineDeficiencyChildrenCancerPlasmaHigh vitamin b12 levelChildrenDiseaseScience & technologyLife sciences & biomedicinePediatricsReview00042226490000516016412310.4274/jcp.79188