Foods and fruits containing vitamin B12 are as follows: 1) meat, such as pork, beef, lamb and chicken, which are often rich in vitamin B12; 2) animal offal, such as pig liver, pig heart, sheep liver, lamb heart, chicken liver and chicken heart, which are often rich in vitamin B12; 3) aquatic fish, such as grass carp, carp, striped bass and yellow croaker, which are rich in vitamin B12. Fruits contain relatively little vitamin B12, and the top ones are often apples, bananas, pears, and oranges, which are relatively abundant.