Ukuntuleka kwevithamini B12 kungenzeka uma umuntu engatholi ngokwanele ivithamini ekudleni kwakhe, futhi eshiywe engelashwa, izinkinga ezifana nezinkinga zamehlo, ukulahlekelwa inkumbulo, ukushaya kwenhliziyo okushesha ngendlela engavamile kanye nokulahlekelwa ukusebenzisana ngokomzimba.

Itholakala kangcono ngokudla okuvela ezilwaneni, njengenyama, i-salmon, ubisi namaqanda, okusho ukuthi izilwane ezidla inyama kanye nabadla imifino bangase babe sengcupheni yokuntula uvithamini B12.

Futhi, ezinye izimo zezokwelapha zingathinta ukumuncwa komuntu kwe-B12, kuhlanganise ne-anemia eyingozi.

Izindebe ezichotshoziwe ziye zaxhunyaniswa nokushoda kwamanye amavithamini B, okuhlanganisa uvithamini B9 (folate), uvithamini B12 (riboflavin) novithamini B6.

Ukuntuleka kwe-zinc nakho kungabangela izindebe eziqhekekile, kanye nokoma, ukucasuka nokuvuvukala emaceleni omlomo.

Izimpawu eziningi ziba ngcono ngokwelashwa, kodwa ezinye izinkinga ezibangelwa isimo zingakwazi ukuhlehliswa uma zingelashwa.

I-NHS iyaxwayisa: “Uma isimo singalashwa isikhathi eside, ayanda amathuba okulimala unomphela.”

I-NHS iyeluleka: “Uma ukuntula kwakho uvithamini B12 kubangelwa ukuntuleka kwevithamini ekudleni kwakho, ungase unikezwe amaphilisi kavithamini B12 ozowaphuza nsuku zonke phakathi kokudla.

“Abantu abakuthola kunzima ukuthola i-vitamin B12 eyanele ekudleni kwabo, njengalabo abalandela ukudla kwe-vegan, bangase badinge amaphilisi e-vitamin B12 impilo yonke.

“Nakuba kungavamile, abantu abanovithamini B12 obangelwa ukudla okungenamsoco isikhathi eside bangase belulekwe ukuba bayeke ukuphuza amaphilisi uma amazinga abo kavithamini B12 esebuyele esimweni esijwayelekile futhi nendlela abadla ngayo isithuthukile.”

Uma ukuntuleka kwevithamini B12 kungabangelwa ukuntuleka kwevithamini B12 ekudleni kwakho, ngokuvamile uzodinga ukuba umjovo we-hydroxocobalamin njalo ngemva kwezinyanga ezimbili kuya kwezintathu impilo yakho yonke.