National Institutes of Health imati nsomba, nyama, nkhuku, mazira, mkaka, ndi zina za mkaka zili ndi vitamini B12.Imawonjezera ma clams ndi chiwindi cha ng'ombe ndi ena mwa magwero abwino kwambiri a vitamini B12.Komabe, si zakudya zonse zomwe zimakhala ndi nyama.Zakudya zina zam'mawa, yisiti zopatsa thanzi, ndi zakudya zina ...
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