Rashin bitamin B12 na iya faruwa idan mutum baya samun isasshen bitamin a cikin abincinsa, kuma ba a ba shi magani ba, rikitarwa kamar matsalolin hangen nesa, ƙarancin ƙwaƙwalwar ajiya, bugun zuciya mai saurin hanzari da rashin haɗin kai na iya faruwa.

Ya fi kyau a samu ta hanyar abincin asalin dabbobi, kamar nama, kifin kifi, madara da kwai, wanda ke nufin masu cin ganyayyaki da masu cin ganyayyaki na iya fuskantar haɗarin zama rashi bitamin B12.

Hakanan, wasu yanayin kiwon lafiya na iya shafar shan mutum na B12, gami da cutar ƙarancin jini.

Hakanan an alakanta leɓu da ƙarancin rashi a cikin sauran bitamin na B, gami da bitamin B9 (folate), bitamin B12 (riboflavin) da bitamin B6.

Rashin zinc din na iya haifar da leɓunan da suka toshe, da bushewa, ƙaiƙayi da kumburi a gefen bakin.

Yawancin alamun sun inganta tare da magani, amma wasu matsalolin da yanayin ya haifar na iya zama ba za a iya sakewa ba idan ba a kula da su ba.

Hukumar ta NHS ta yi gargadin cewa: "Duk tsawon lokacin da ba za a magance shi ba, hakan zai iya haifar da damar lalacewar dindindin."

Hukumar ta NHS ta ba da shawara: “Idan rashin bitamin a cikin abincinku ya haifar da karancin bitamin B12 ɗinku, za a iya ba ku ƙwayoyin bitamin B12 su sha kowace rana tsakanin abinci.

“Mutanen da suke da wahalar samun isasshen bitamin B12 a cikin abincinsu, kamar waɗanda ke bin cin ganyayyaki, na iya buƙatar allunan bitamin B12 na rayuwa.

“Although it's less common, people with vitamin B12 deficiency caused by a prolonged poor diet may be advised to stop taking the tablets once their vitamin B12 levels have returned to normal and their diet has improved.”

Idan karancin bitamin B12 din bai haifar da rashin bitamin B12 a cikin abincinku ba, yawanci kuna bukatar yin allurar hydroxocobalamin kowane wata biyu zuwa uku na sauran rayuwarku.