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