The first is meat, such as pork, beef, mutton, chicken, quail meat, etc. These meats are very important sources of vitamin B12. The second, animal offal, such as pig liver, heart liver, lamb liver, animal offal is often rich in vitamin B12. third, is often eaten fish, such as striped bass, carp, carp, tilapia, fish is rich in vitamin B12 amount. Fourth, eggs, such as eggs, duck eggs and goose eggs, so to supplement vitamin B12 basically rely on meat, animal offal, fish and eggs to supplement the organism.