Vitamin B12 is an essential nutrient in the human body, and its deficiency may lead to symptoms such as mouth ulcers, loss of vision, loss of taste, and even megaloblastic anemia and dementia. Vitamin B12 is mainly found in meat and seafood, a small part from milk and eggs and their fermented products, plant foods such as fruits and vegetables contain less vitamin B12, you can choose the following foods rich in vitamin B12 in daily life to supplement the nutrients: 1, meat: meat contains a certain amount of vitamin B12, especially animal offal, such as chicken liver, goose liver, etc. Vitamin B12 content is more; 2, seafood category: such as clams, octopus, oysters, herring and other aquatic products also contain a large amount of vitamin B12, especially clams are rich in vitamin B12; 3, eggs and milk, soy products and coarse grains: eggs, milk, cheese, tofu and some coarse grains also contain a small amount of vitamin B12, but the content is relatively small, usually not enough to maintain the body’s required vitamin B12 levels. In addition, elderly people, vegetarians or those in special circumstances such as pregnancy are prone to vitamin B12 deficiency. They can go to the hospital to have their vitamin B12 levels checked, and if it is clear that they are deficient, they can take vitamin B12 preparations under the guidance of a doctor to avoid more serious conditions such as pernicious anemia or neurological dysfunction.