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People who have a rare blood disorder (polycythemia vera) may infrequently have symptoms related to this disorder while taking cyanocobalamin

Boost Metabolism : B12 promotes the proper function of the nervous system, which is essential for maintaining a healthy metabolism

Among the participants who didnt take a B12-containing supplement (including multivitamins), intake of 0.51 g/day of B12 from fortified, non-dairy milk was associated with higher serum B12 and holotranscobalamin (a measure of recent B12 intake)

Unexplained hypercobalaminemia, particularly levels above 1,000 pg/mL, has been associated with liver disease, kidney dysfunction, myeloproliferative disorders, and certain solid cancers in multiple large-scale studies