?????? B12 ??? ?????? ????? ????? ???? ????. ??? ???? ? ?????? ???????. ???? ????? ??????? ?? ?????? ?????? ?????? ????? ???? ?? ???????? B12 ?????? ??????? ????>??????. ?????? B12 ???? ????? ??????? ????. : ???, ????? ??? ????? ?????? B12 ???????. ???? ???? ??????? ?? ?????? ???? ???????? ????? ????? B12 ???? ?????? B-12 ???? ?????? B-1