Vithamine B12 / Cyanocobalamin / methylcobalamin ke mofuta oa vithamine B12 oa maiketsetso. Vithamine B12 e hlahang ka tlhaho e fumanoa ka litlhapi, lijo tsa leoatleng, lebese, yolk ea mahe le chisi tse belisitsoeng. Vithamine B12 e bohlokoa kholisong ea lisele tse phetseng hantle tsa mali, lisele tsa methapo le liprotheine 'meleng le metabolism e tloaelehileng ea mafura le khabohaedreite' meleng. Ho haella ha vithamine B12 ho ka baka khaello ea mali, mathata a mala le tšenyo ea methapo. Cyanocobalamin e phekola kapa e thibela khaello ea vithamine B12 le mofuta o hlahisoang ke phokolo ea mali, e bitsoang anemia e kotsi.