 Bimwe mu byo abatarya ibikomoka ku matungo cyangwa inyamaswa bashobora gukuramo intungamubiri ya B12, ni nkibi: ifunguro rya mu gitondo rigizwe nibinyampecye bikungahaye muri B12 ibinyobwa bikozwe muri soya - bitashyizwemo ibyongera kuryoherera - bikungahaye muri B12 ibikomoka ku misemburo - nkikiribwa cyitwa Marmite - bikungahaye muri B12 Rebecca McManamon, ujya inama zijyanye nindyo nimirire akaba numuvugizi wishyirahamwe ryindyo ryUbwongereza, avuga ko kurya indyo zikumira ibiribwa bimwe bishobora kubaho kubera impamvu zitandukanye zirimo nko kugirwaho ingaruka ku mubiri zitewe no kurya ibiribwa runaka, indwara runaka, bituma hari abakenera gusuzumwa nimpuguke. 