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English definition of “vitamin B12”

vitamin B12

noun [U]     /ˌvɪt.ə.mɪnˌbiːˈtwelv/ US  /ˌvaɪ.t̬ə-/
a vitamin found in foods such as liver , kidney , eggs , fish , and milk . It is important for a healthy nervous system, normal growth , and the production of red blood cells .Vitamins and minerals
(Definition of vitamin B12 noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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