Translations:Vitamin B12/4/en

| bioavailability = Readily absorbed in distal half of the ileum. | protein_bound = Very high to specific transcobalamins plasma proteins.
Binding of hydroxocobalamin is slightly higher than cyanocobalamin. | metabolism = Liver | elimination_half-life = Approximately 6 days
(400 days in the liver). | excretion = Kidney